Logical Model
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| Information Concept | Data Concept | Definition | Type |
|---|---|---|---|
| AerialRefuelling | - | A procedure used by the military to transfer fuel from one aircraft to another during flight. | - |
| WorkAreaActivity | isActive | An indication that an aerodrome work area is active. | Boolean |
| WorkAreaActivity | - | Aerodrome work area activity information. | - |
| WorkArea | associatedAerodrome | The aerodrome the work area is associated with. | Aerodrome |
| WorkArea | activation | Time period during which the building site is active or not. | WorkAreaActivity |
| WorkArea | type | The type of work performed in the work area. | CodeWorkAreaType |
| WorkArea | plannedOperational | Date when the activities in the construction area are expected to be operational. | Date |
| WorkArea | - | A part of an aerodrome in which maintenance or construction works are in progress. | - |
| WindShear | level | Altitude expressed as a vertical distance where the wind shear occurs. | ValDistanceType |
| WindShear | - | Local variation of the wind vector or any of its components in a given direction. | - |
| WindLayer | windVariesTo | Indication of the variation of the direction and speed of the wind. windVariesTo indicates the final value of the direction and speed of a varying wind. | Wind |
| WindLayer | windInfo | The wind information. | Wind |
| WindLayer | windVariesFrom | Indication of the variation of the direction and speed of the wind. windVariesFrom indicates the initial value of the direction and speed of a varying wind. | Wind |
| WindLayer | windCharacteristics | Description of the wind characteristics. | CodeWindCharacteristicType |
| WindLayer | - | Vertically bounded area wind phenomenon, characterized by several attributes of type WindDirection, WindSpeed, a position and a height. | - |
| Wind | windSpeed | The speed of the wind. | ValSpeedType |
| Wind | windGust | Variation from the mean surface wind speed as defined by ICAO Annex 3. | ValSpeedType |
| Wind | windDirection | Direction from which wind is blowing. | Angle |
| Wind | verticalWindGust | Component wind gust in the upward or downward direction. | ValSpeedType |
| Wind | minWindSpeed | The minimum speed of the wind. | ValSpeedType |
| Wind | maxWindSpeed | The maximum speed of the wind. | ValSpeedType |
| Wind | isVariable | Indication that the direction of the wind changes frequently. According to Annex 3 the wind is reported as variable (VRB) in local routine or special reports, in METAR and SPECI, when one of the following situations occur: - when the total variation is 60 or more and less than 180 and the wind speed is less than 1.5 m/s (3 kt), the wind direction shall be reported as variable with no mean wind direction; or - when the total variation is 180 or more, the wind direction shall be reported as variable with no mean wind direction. | Boolean |
| Wind | isCalm | Indication that the wind is forecast to be less than 0.5 m/s (1 kt). | Boolean |
| Wind | headwind | A wind blowing from directly in front, opposing forward motion or orientation. | ValSpeedType |
| Wind | extremeCounterClockwiseWindDirection | The extreme counter-clockwise direction from which the wind is blowing, inclusive. | Angle |
| Wind | extremeClockwiseWindDirection | The extreme clockwise direction from which the wind is blowing, inclusive. | Angle |
| Wind | crosswind | A wind blowing perpendicularly to one's direction of travel or orientation. | ValSpeedType |
| Wind | - | Air motion relative to the Earth's surface. Unless otherwise specified, only the horizontal component is considered. | - |
| WeatherRadar | weatherRadarType | The type of weather radar system. | CodeWeatherRadarType |
| WeatherRadar | - | Radar used to observe weather elements and phenomena. | - |
| WeatherPhenomenon | movement | The movement of the weather phenomenon. | MovementDescription |
| WeatherPhenomenon | weatherCondition | The observation or forecast of the weather phenomenon. | WeatherCondition |
| WeatherPhenomenon | element | A phenomenon which forms an element of this phenomenon. | WeatherPhenomenon |
| WeatherPhenomenon | top | Altitude of the highest level of the description of a weather phenomenon. | ValDistanceType |
| WeatherPhenomenon | significantWeatherQualifier | A qualifier used in association with a reported significant weather phenomenon. | CodeSignificantWeatherQualifierType |
| WeatherPhenomenon | phenomenonType | Description of the type of a weather phenomenon. | CodeWeatherPhenomenonType |
| WeatherPhenomenon | intensity | Severity of a weather phenomenon. | CodeWeatherIntensityType |
| WeatherPhenomenon | base | Altitude of the lowest level of the description of a weather phenomenon. | ValDistanceType |
| WeatherPhenomenon | - | A meteorological event. | - |
| WeatherObserver | contactDetails | The contact details of the weather observer. | ContactInformation |
| WeatherObserver | organisation | The organisation for which the weather observer works. | Organisation |
| WeatherObserver | - | The agent responsible for manual weather observations. | - |
| WeatherLayer | cloud | A cloud forming part of the weather layer. | Cloud |
| WeatherLayer | obscuration | An obscuration forming part of the weather layer. | Obscuration |
| WeatherLayer | - | An array of clouds and/or obscurations whose bases are at approximately the same level. | - |
| WeatherInformationSource | location | The facility where the weather information source is located. | Facility |
| WeatherInformationSource | isWeatherStation | Indicator that the source is a weather station. | Boolean |
| WeatherInformationSource | isAltimeterInformationProvided | Indicates whether the weather source provides altimeter information. | Boolean |
| WeatherInformationSource | - | An automated or non-automated weather information source. | - |
| WeatherCondition | contour | A contour used to outline a particular weather situation within the forecast or observation. | Contour |
| WeatherCondition | weatherInformationSource | The weather information source. | WeatherInformationSource |
| WeatherCondition | phenomenon | The phenomenon of relevance for the weather condition. | WeatherPhenomenon |
| WeatherCondition | type | The type of weather condition being reported. | CodeWeatherConditionType |
| WeatherCondition | probability | Relative likelihood of a forecast expressed as a percentage. | Decimal |
| WeatherCondition | hasNoSignificantWeather | Indication that no specified en-route weather phenomena which may affect the safety of aircraft operations is occurring or expected to occur. | Boolean |
| WeatherCondition | confidence | Quality of trusting for a forecast expressed as a percentage. | Decimal |
| WeatherCondition | changeIndicator | Indication about the type of meteorological conditions changes. | CodeChangeIndicatorType |
| WeatherCondition | analysisTime | The time at which the forecast or observation process starts. | DateTime |
| WeatherCondition | - | Weather observations or forecast for an area of interest. | - |
| WaterLaneEnd | markingBuoy | A buoy used to mark the water lane end. | MarkingBuoy |
| WaterLaneEnd | width | The overall width of the primary water lane. | ValDistanceType |
| WaterLaneEnd | isStandardAirMarkerUsed | Indicates that a Standard Air Maker is used at the location. The anchor symbol, similar to the designator found on aeronautical charts, is the Standard Air Marker used to designate a seaplane base. The symbol is often painted on roofs or other flat surfaces that are easily visible from the air. | Boolean |
| WaterLaneEnd | name | Name given to the water lane end. | CharacterString |
| WaterLaneEnd | primaryWaterCentroidLocation | The geographic location of the primary water centroid, used to determine the primary and alternate water lanes within the water operating area. | Integer |
| WaterLaneEnd | length | The overall length of the primary water lane. | ValDistanceType |
| WaterLaneEnd | depth | The depth of the primary water lane with respect to mean lowest low tide. | ValVerticalDistanceType |
| WaterLaneEnd | cardinalDirection | Code indicating the cardinal compass location of the turning basin from centroid of the WaterLaneEnd. | CodeCompassPointType |
| WaterLaneEnd | approachGuidance | Identifies the type of approach guidance in use or planned for the Water Lane End. | CharacterString |
| WaterLaneEnd | airMarkerColour | The color of the air marker at the location (if any). | CodeColourType |
| WaterLaneEnd | - | The end of the water lane (typically located at the furthest end of a turning basin) suitable for landing or takeoff runs of aircraft. WaterLaneEnds define the water lane and describe the approach/departure procedure characteristics of a water lane. | - |
| WaterBodyCondition | surfaceTemperature | The temperature of the ocean surface. The term sea surface temperature is generally meant to be representative of the upper few meters of the ocean as opposed to the skin temperature, which is the temperature of the upper few centimeters. | ValTemperatureType |
| WaterBodyCondition | significantWaveHeight | The vertical distance between the trough and crest of a wave of operational significance. | ValVerticalDistanceType |
| WaterBodyCondition | - | Weather observations or forecasts over a defined water body. | - |
| WaterBody | associatedAerodrome | The aerodrome in the vicinity of which the water body is located. | Aerodrome |
| WaterBody | name | Name of the sea. | CharacterString |
| WaterBody | - | A stretch of water on the surface of the Earth. | - |
| VOR | informationService | The Information service which broadcasts on the VOR | InformationService |
| VOR | zeroBearingDirection | A code indicating the direction of the 'zero bearing' provided by the station. | CodeNorthReferenceType |
| VOR | type | A code indicating a type of VOR. | CodeVORType |
| VOR | frequency | The value of the frequency. | ValFrequencyType |
| VOR | declination | The angular difference between True North and the station declination. | Angle |
| VOR | - | A short-range, very-high-frequency omnidirectional beacon which provides an indication in the aircraft of the bearing of the beacon, or left-right track indication. | - |
| Volcano | name | The name of the volcano. | CharacterString |
| Volcano | - | A geological formation in form of an Earth crust opening/rupture, which allows hot magma, volcanic ash and gases from below the surface, escape into the atmosphere. | - |
| VolcanicAshCloud | volcanicActivity | The volcanic activity at the origin of the volcanic ash cloud. | VolcanicActivity |
| VolcanicAshCloud | ashConcentration | Mass concentration of ash in an ash cloud expressed in mass unit per volume unit. | ValConcentrationType |
| VolcanicAshCloud | - | Ash contaminated atmospheric volume. | - |
| VolcanicActivity | volcano | The active volcano. | Volcano |
| VolcanicActivity | ashCloud | The volcanic ash cloud generated by the volcanic activity. | VolcanicAshCloud |
| VolcanicActivity | isErupting | Indication wether a volcano is erupting or not. | Boolean |
| VolcanicActivity | - | Volcanic unrest or eruption. | - |
| VisualGlideSlopeIndicator | runwayDirection | The runway direction associated with the visual glide slope indicator. | RunwayDirection |
| VisualGlideSlopeIndicator | type | The type of visual glide slope indicator system installed, based upon the number, colour, and/or position of various components. | CodeVASISType |
| VisualGlideSlopeIndicator | slopeAngle | A descent angle determined by a visual glide slope indicator system for visual vertical guidance during the final approach of an aircraft. | Angle |
| VisualGlideSlopeIndicator | position | A location, relative to a runway centreline, of the visual approach slope indicator for a final approach and take off area (FATO)/runway direction. | CodeRelativePositionType |
| VisualGlideSlopeIndicator | numberBox | The number of units that compose the visual glide slope indicator system. | Integer |
| VisualGlideSlopeIndicator | minimumEyeHeightOverThreshold | The minimum height of the aircraft cockpit over the threshold when the aircraft glide slope indicator is showing an on-slope indication. | ValVerticalDistanceType |
| VisualGlideSlopeIndicator | isPortable | An indicator of whether or not a runway's visual glide slope indicator system is capable of being transported or conveyed. | Boolean |
| VisualGlideSlopeIndicator | - | A visual guidance system that provides 'below/above glidepath' information to an aircraft executing an approach to a specific runway direction. | - |
| VerticalStructurePart | lighting | An element of the vertical structure part lighting. | LightElement |
| VerticalStructurePart | visibleMaterial | An indicator of the type(s) of material that compose the load-bearing structure and/or exterior facing of a vertical construction. | CodeVerticalStructureMaterialType |
| VerticalStructurePart | verticalExtentAccuracy | Accuracy of the value of the declared vertical extent of the vertical structure part. | ValDistanceType |
| VerticalStructurePart | verticalExtent | The vertical extent of the vertical structure part. | ValDistanceType |
| VerticalStructurePart | type | An indicator of the type of vertical structure part. | CodeVerticalStructureType |
| VerticalStructurePart | topElevation | The vertical distance of the highest point of the vertical structure measured from mean sea level. | ValAltitudeType |
| VerticalStructurePart | markingSecondColour | The secondary colour for the marking of the vertical structure part. | CodeColourType |
| VerticalStructurePart | markingPattern | The general layout of the external paint or another marking element, intended to increase the visibility of the vertical structure part. | CodeVerticalStructureMarkingType |
| VerticalStructurePart | markingFirstColour | The principal colour of the marking of the vertical structure part. | CodeColourType |
| VerticalStructurePart | isMobile | Indication whether the vertical structure part is expected to move around its nominal location. | Boolean |
| VerticalStructurePart | isFrangible | An indicator that the vertical structure part is easily broken. | Boolean |
| VerticalStructurePart | designator | A distinguishing label by which the vertical structure part is identified locally. | CharacterString |
| VerticalStructurePart | constructionStatus | The status of construction of the man-made object that constitutes the vertical structure part. | CodeStatusConstructionType |
| VerticalStructurePart | - | A part of the vertical structure that can be represented as point, line or polygon with vertical extent. | - |
| VerticalStructure | associatedAerodrome | The aerodrome associated with the vertical structure | Aerodrome |
| VerticalStructure | supportedGroundLight | The ground light system supported by the vertical structure. | GroundLightSystem |
| VerticalStructure | marker | The marker beacon that marks the vertical structure. | MarkerBeacon |
| VerticalStructure | hostedRadioNavigationEquipment | The radio navigation aid hosted by the vertical structure. | RadioNavigationAid |
| VerticalStructure | hostedSpecialNavigationStation | The special navigation station hosted by the vertical structure. | SpecialNavigationStation |
| VerticalStructure | obstacleArea | The ObstacleArea in which the vertical Structure is situated | ObstacleArea |
| VerticalStructure | lightingAvailability | The operational status of the vertical structure lighting. | LightStatus |
| VerticalStructure | supportedService | The service supported by the vertical structure. | Service |
| VerticalStructure | hostedOrganisation | The organisation hosted by the vertical structure. | Organisation |
| VerticalStructure | part | Part of the vertical structure. | VerticalStructurePart |
| VerticalStructure | hostedPassengerService | The passenger service hosted by the vertical structure. | PassengerService |
| VerticalStructure | obstacleDocumentation | Documentation of how an obstacle is obtained, studied and/or built. | Document |
| VerticalStructure | hostedUnit | The unit hosted by the vertical structure. | Unit |
| VerticalStructure | width | Overall width of the vertical structure. | ValDistanceType |
| VerticalStructure | type | The type of vertical structure. | CodeVerticalStructureType |
| VerticalStructure | radius | The overall length of the radius of a vertical structure that has a relatively circular shape. | ValDistanceType |
| VerticalStructure | name | The name of the vertical structure. | CharacterString |
| VerticalStructure | length | The overall length of the vertical structure. | ValDistanceType |
| VerticalStructure | isSynchronisedLighting | Indication that the flashing light elements that compose the lighting of the vertical structure (could be a group) are synchronised (flash in unison). | Boolean |
| VerticalStructure | isMarkingICAOStandard | Indication whether vertical structure markings comply with the International Civil Aviation Organisation (ICAO) standard, as described in Annex 14. | Boolean |
| VerticalStructure | isLightingICAOStandard | Indication whether the lighting complies with the ICAO standard as described in Annex 14. | Boolean |
| VerticalStructure | isLighted | Indication that the vertical surface is lighted. | Boolean |
| VerticalStructure | isGroup | An indication that the vertical structure consists of a number of closely situated similar objects. | Boolean |
| VerticalStructure | - | All fixed and mobile objects, or parts thereof that extend above the surface of the Earth. | - |
| VerticalConstraint | - | A restriction brought to the vertical component of the trajectory of an aircraft. | - |
| Vehicle | state | Current vehicle vector. | AircraftState |
| Vehicle | - | Any means of carriage, conveyance, or transport. | - |
| ValWeightType | uom | Unit of measure | CodeUomWeightType |
| ValWeightType | - | The weight value. | - |
| ValVerticalDistanceType | verticalReference | The reference surface used for determining the value of the vertical distance. | CodeVerticalReferenceType |
| ValVerticalDistanceType | specialHeightValue | ATM specific height type | CodeSpecialHeightValueType |
| ValVerticalDistanceType | heightReference | The reference surface for a height value. | CodeHeightReferenceType |
| ValVerticalDistanceType | - | The separation between two points in the vertical plane. | - |
| ValVelocityType | direction | The direction of travel. | Angle |
| ValVelocityType | - | Velocity is the instantaneous rate of change of position with time. It is usually calculated using the simple formula, the change in position during a given time interval. | - |
| ValTemperatureType | uom | Unit of measure | CodeUomTemperatureType |
| ValTemperatureType | - | The value of a temperature. | - |
| ValSpeedWithBoundaryType | valueInterpretation | Indication of how the speed value should be interpreted. | CodeValueInterpretationType |
| ValSpeedWithBoundaryType | speedTolerance | Allowable amount of variation in speed. | SpeedRangeType |
| ValSpeedWithBoundaryType | - | A speed contained within given limits. | - |
| ValSpeedType | uom | Unit of measure | CodeUomVelocityType |
| ValSpeedType | - | The measure of motion in terms of speed in a particular direction. It is usually calculated using the simple formula, the change in position during a given time interval. | - |
| ValRateOfTurnType | turnIndicator | The turn indicator. | CodeDirectionTurnType |
| ValRateOfTurnType | precision | The precision of the unit. | Number |
| ValRateOfTurnType | accuracy | Accuracy (standard deviation) of the measured value. | Number |
| ValRateOfTurnType | - | The value of a rate of turn. | - |
| ValPressureType | uom | Unit of measure | CodeUomPressureType |
| ValPressureType | - | The value of a pressure. | - |
| ValPowerType | uom | Unit of measure | CodeUomPowerType |
| ValPowerType | - | The value of a power. | - |
| ValParticleFluxType | uom | Unit of measure | CodeUomParticleFluxType |
| ValParticleFluxType | - | The value of the particle flux. | - |
| ValParticleContentType | uom | Unit of measure | CodeUomParticleContentType |
| ValParticleContentType | - | The value of a particle content. | - |
| ValMassType | uom | Unit of measure | CodeUomMassType |
| ValMassType | - | A mass value. | - |
| ValLightIntensityType | uom | Unit of measure | CodeUomLuminousIntensityType |
| ValLightIntensityType | - | The luminous intensity of a light source. It is a measure of the wavelength-weighted power emitted by a light source in a particular direction. | - |
| ValHexType | pattern | A regular expression constraining the datatype | CharacterString |
| ValHexType | - | A hexadecimal value. | - |
| ValFrequencyType | uom | Unit of measure | CodeUomFrequencyType |
| ValFrequencyType | - | The frequency value of a navigation system. | - |
| ValEnergyFluxType | uom | Unit of measure | CodeUomEnergyFluxType |
| ValEnergyFluxType | - | missing data | - |
| ValDistanceType | uom | Unit of measure | CodeUomLengthType |
| ValDistanceType | - | The separation between two points. | - |
| ValConcentrationType | uom | Unit of measure | CodeUomMassConcentrationType |
| ValConcentrationType | - | The value of a concentration, which represent the abundance of a constituent divided by the total volume of a mixture. | - |
| ValAltitudeWithBoundaryType | valueInterpretation | Indication of how the altitude value should be interpreted. | CodeValueInterpretationType |
| ValAltitudeWithBoundaryType | altitudeTolerance | Allowable amount of variation in altitude. | AltitudeRangeType |
| ValAltitudeWithBoundaryType | - | An altitude contained within given limits. | - |
| ValAltitudeType | - | The vertical distance of a level, a point or an object considered as a point, measured from mean sea level (MSL). | - |
| ValAccelerationType | uom | Unit of measure | CodeUomAccelerationType |
| ValAccelerationType | - | Calculated acceleration of the target expressed in Cartesian co-ordinates. | - |
| UsageCondition | aircraftType | A type of aircraft for which the usage is specified. | AircraftType |
| UsageCondition | weather | Weather conditions for which the usage is specified. | AviationCondition |
| UsageCondition | flight | A type of flight for which the usage is specified. | Flight |
| UsageCondition | contact | The contact information for a person or group. | ContactInformation |
| UsageCondition | type | The nature of the limitation which determines rules for usage of an aerodrome or one of its surfaces. | CodeUsageLimitationType |
| UsageCondition | priorPermission | An indication that a prior permission is required before using the aerodrome movement area. | TM_Duration |
| UsageCondition | - | A rule governing the usage of an aerodrome or one of its surfaces. | - |
| UpperAirObservingSystem | upperAirObservationSystemType | The type of upper air observing system. | CodeUpperAirObservationSystemType |
| UpperAirObservingSystem | - | The upper-air observing program of NOAA, composed a network of ground-based remote-sensing wind profilers, en-route commercial aircraft in-situ observations (MDCRS), upper-air observations taken manually by pilots and disseminated by PIREPs, and of a network of rawinsonde stations (section 0). | - |
| UnplannedHolding | holdingFix | Point used to evaluate safe holding. | InfrastructurePoint |
| UnplannedHolding | unplannedHolding | Indication whether the holding pattern is used as an unplanned holding. | CodeApprovalType |
| UnplannedHolding | isCompletelyWithinControlledAirspace | Indication whether the unplanned holding is completely contained within controlled airspace. | Boolean |
| UnplannedHolding | authorizedAltitude | Approved altitude based on unplanned holding assessment. | ValVerticalDistanceType |
| UnplannedHolding | - | A specific holding procedure requested at an en-route fix on airway or route radials, bearings, or courses. | - |
| UnitDependency | type | An indicator of the kind of dependency that a related unit has in relation to the unit. | CodeUnitDependencyType |
| UnitDependency | - | The operational or functional relationship between two related units. | - |
| UnitAvailability | operationalStatus | An indicator of the operational status of a Unit in regards to its availability. | CodeStatusOperationsType |
| UnitAvailability | - | Status and scheduling information about a unit. | - |
| Unit | airspaceUnderResponsibility | The Airspace which is under the responsibility of the Unit | Airspace |
| Unit | areaOfResponsibility | The airspace wherein flights are under the control of the ATSU. | Airspace |
| Unit | areaOfInterest | The volumetric extension of the area of resposibility of an ATSU that allows detecting flights of interest. | Airspace |
| Unit | aerodromeLocation | The aerodrome where the unit is located. | Aerodrome |
| Unit | surveillanceRadar | SurveillanceRadar utilised by the Unit | SurveillanceRadar |
| Unit | service | The service provided by the Unit | Service |
| Unit | contact | Contact details for the unit. | ContactInformation |
| Unit | ownerOrganisation | The organisation to which the unit belongs. | Organisation |
| Unit | availability | The operational status of the unit. | UnitAvailability |
| Unit | relatedUnit | The related unit. | Unit |
| Unit | unitRole | The role played by the unit. | CodeRoleKindType |
| Unit | unitResponsibility | The responsibility of the unit. | CodeResponsibilityKindType |
| Unit | type | An indicator of the type of unit, usually related to the standard type of services provided by it. | CodeUnitType |
| Unit | name | The full textual name of a unit, established according to the rules specified by International Civil Aviation Organisation (ICAO), and specifically in the official language of the country, transposed into the Latin Alphabet where necessary. | CharacterString |
| Unit | military | An indicator of the operational nature of the unit. | CodeMilitaryOperationsType |
| Unit | locationIndicatorICAO | A four-letter code group formulated in accordance with rules prescribed by ICAO and assigned to the ATS unit. | CharacterString |
| Unit | isIOPEnabled | Indication whether the unit is IOP-enabled. | Boolean |
| Unit | isCpdlcEnabled | Indication whether CPDLC facility is enabled. | Boolean |
| Unit | isCompliantICAO | An indicator that the Unit is setup according to the International Civil Aviation Organisation (ICAO) Standards and Recommended Practices (SARPS). | Boolean |
| Unit | isAirspaceManagementCell | Indicates whether the Unit is an AMC, a joint civil/military unit responsible for the day-to-day management and temporary allocation of national or sub-regional airspace under the jurisdiction of one or more ECAC state(s). | Boolean |
| Unit | designator | A distinguishing label, term, abbreviation or acronym used to identify the Unit. | CharacterString |
| Unit | - | A generic term referring to all types of entities providing all types of ATM related services. | - |
| TwoDimensionalSurfaceType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| TwoDimensionalSurfaceType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| TwoDimensionalSurfaceType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| TwoDimensionalSurfaceType | - | Derived from GM_Surface and extended to include Horizontal Accuracy properties | - |
| TwoDimensionalPointType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| TwoDimensionalPointType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| TwoDimensionalPointType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| TwoDimensionalPointType | - | Derived from GM_Point and extended to include Horizontal Accuracy properties | - |
| TwoDimensionalCurveType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| TwoDimensionalCurveType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| TwoDimensionalCurveType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| TwoDimensionalCurveType | - | Derived from GM_Curve and extended to include Horizontal Accuracy properties | - |
| TurningBasin | width | The overall width measurement of the turning basin to the nearest 5 feet. | ValDistanceType |
| TurningBasin | restriction | Any restrictions or cautions associated with the Turning Basin. | CharacterString |
| TurningBasin | name | A commonly used name for the turning basin. | CharacterString |
| TurningBasin | length | The overall length measurement of the turning basin to the nearest 5 feet. | ValDistanceType |
| TurningBasin | diameter | The diameter of the turning basin available for use by aircraft to the nearest 5 feet. | ValDistanceType |
| TurningBasin | depth | The depth measurement of the turning basin with respect to mean lowest low tide to the nearest 0.5 foot. | ValVerticalDistanceType |
| TurningBasin | cardinalDirection | Code indicating the cardinal compass location of the turning basin from centroid of the WaterLaneEnd. | CodeCompassPointType |
| TurningBasin | - | A water area used for the maneuvering of aircraft where the use of water surface is restricted. Turning basins should be located adjacent to shoreline facilities and at each end of the water operating area. | - |
| Turbulence | turbulenceType | The type of turbulence. | CodeTurbulenceType |
| Turbulence | edr | Eddy dissipation rate, characterization of atmospheric turbulence. | Decimal |
| Turbulence | - | Atmospheric flow regime characterized by chaotic and stochastic property changes. This includes low momentum diffusion, high momentum convection, and rapid variation of pressure and velocity in space and time. | - |
| Tropopause | temperature | The temperature of the tropopause. | ValTemperatureType |
| Tropopause | - | The boundary between the troposphere and the stratosphere, where an abrupt change in lapse rate usually occurs. | - |
| TropicalCyclone | name | Name of the tropical cyclone. | CharacterString |
| TropicalCyclone | maxSurfaceWindSpeed | Maximum surface wind speed of a tropical cyclone. | ValSpeedType |
| TropicalCyclone | centralPressure | Pressure at the centre of the cyclone. | ValPressureType |
| TropicalCyclone | - | Cyclone of tropical origin of small diameter (some hundreds of kilometres) with minimum surface pressure in some cases less than 900 hPa, very violent winds and torrential rain; sometimes accompanied by thunderstorms. It usually contains a central region, known as the eye" of the storm, with a diameter of the order of some tens of kilometres, and with light winds and more or less lightly clouded sky." | - |
| TrafficSeparationService | isRadarAssisted | Indication whether the service is provided with radar assistance. | Boolean |
| TrafficSeparationService | isDataLinkEnabled | Indication whether Controller-Pilot Data-Link Communication (CPDLC) is available in support of the service. | Boolean |
| TrafficSeparationService | dataLinkChannel | The channel on which the data-link takes place, if applicable. | CharacterString |
| TrafficSeparationService | airTrafficServiceType | The type of air traffic service provided. | CodeAirTrafficServiceType |
| TrafficSeparationService | - | A service that provides control and separation services, to aircraft in the air and on the ground. | - |
| TouchDownLiftOffSafeArea | protectedTouchDownLiftOff | The protected touch down and lift-off area. | TouchDownLiftOff |
| TouchDownLiftOffSafeArea | - | An obstacle-free area situated in the vicinity of a touchdown and lift-off area, provided to protect helicopters during manoeuvring, take-off and / or landing operations. | - |
| TouchDownLiftOffMarking | markedTouchDownLiftOff | The touch down lift-off marked. | TouchDownLiftOff |
| TouchDownLiftOffMarking | TLOFmarkingType | The type of TLOF marking. | CodeTLOFMarkingType |
| TouchDownLiftOffMarking | - | A symbol or group of symbols displayed on the surface of the touch down and lift-off area at an aerodrome. | - |
| TouchDownLiftOffLightSystem | lightedTouchDownLiftOff | The touch down lift off zone lit by the touch down lift-off light system. | TouchDownLiftOff |
| TouchDownLiftOffLightSystem | position | A indication of the part of the touch down and lift-off surface the lighting system is serving. | CodeTLOFSectionType |
| TouchDownLiftOffLightSystem | - | The lighting system provided for a touch down and lift-off surface at an aerodrome. | - |
| TouchDownLiftOffContamination | contaminatedTLOF | The contaminated TouchDownLiftOff. | TouchDownLiftOff |
| TouchDownLiftOffContamination | - | The presence or removal of hazardous conditions due to snow, ice, slush, water, etc. on the Touch Down and Lift-Off (TLOF) surface. | - |
| TouchDownLiftOff | helicopterClass | The class of a helicopter associated with a touch down and lift-off area. | AircraftCategory |
| TouchDownLiftOff | aimingPoint | The centre point of the touch down lift-off used as a significant point on instrument approach procedures. | InfrastructurePoint |
| TouchDownLiftOff | contaminant | Touch down lift-off contaminant. | TouchDownLiftOffContamination |
| TouchDownLiftOff | associatedAerodrome | The aerodrome the touch down lift-off zone is associated with. | Aerodrome |
| TouchDownLiftOff | connectingGuidanceLine | A GuidanceLine which connects to the TouchDownLiftOff | GuidanceLine |
| TouchDownLiftOff | availability | The operational status of the touch down lift-off area. | ManoeuvringAreaAvailability |
| TouchDownLiftOff | approachTakeOffArea | The approach and take off runway area containing the touchdown lift off zone. | Runway |
| TouchDownLiftOff | surfaceProperties | Surface characteristics of the touch down and lift-off zone. | SurfaceCharacteristics |
| TouchDownLiftOff | touchDownLiftOffLightSystem | The LightSystem provided for an TouchDownLiftOff | TouchDownLiftOffLightSystem |
| TouchDownLiftOff | touchDownLiftOffMarking | The Marking marked on the TouchDownLiftOff | TouchDownLiftOffMarking |
| TouchDownLiftOff | touchDownLiftOffSafeArea | A safe area protecting the touch down lift-off area. | TouchDownLiftOffSafeArea |
| TouchDownLiftOff | navaid | Navaid installed at a particular landing area. | RadioNavigationService |
| TouchDownLiftOff | width | The physical width of the touchdown and lift-off area. | ValDistanceType |
| TouchDownLiftOff | slope | The slope (rate of upward inclination of the surface from the horizontal) of the surface of a touch down and lift-off area. | Decimal |
| TouchDownLiftOff | length | The physical length of the touchdown and lift-off area. | ValDistanceType |
| TouchDownLiftOff | isAbandoned | An indicator that the touch down and lift-off area is no longer in operational use, but it is still physically present and visible, although usually in a degraded state. | Boolean |
| TouchDownLiftOff | designator | The designator of the touch down and lift-off area. | CharacterString |
| TouchDownLiftOff | - | A load bearing area on which a helicopter may touch down or lift off. | - |
| TornadicVortex | isWaterspout | Indicates a violent, rotating column of air that forms over a body of water, and touches the water surface; tornado or funnel cloud that touches a body of water. | Boolean |
| TornadicVortex | isTornado | Indicates a violent, rotating column of air touching the ground. It forms a pendant, usually from a cumulonimbus cloud, nearly always starts as a funnel cloud, and is accompanied by a loud roaring noise. | Boolean |
| TornadicVortex | isFunnelCloud | Indicates a violent, rotating column of air, which does not touch the surface, usually appended to a cumulonimbus cloud. | Boolean |
| TornadicVortex | - | A violently rotating column of air, usually pendant to a cumulonimbus, with circulation reaching the ground. It nearly always starts as a funnel cloud and may be accompanied by a loud roaring noise. | - |
| Timesheet | timeReference | An indicator of the time reference system or reference system offset for time values specified in the timesheet. | CodeTimeReferenceType |
| Timesheet | startTimeRelativeEvent | The number of minutes before or after the start event when the period described in the timesheet starts. | TM_Duration |
| Timesheet | startTime | The time of the day when the period described in the timesheet starts. | ClockTime |
| Timesheet | startEventInterpretation | When both the 'StartTime' and 'StartEvent' values of a timesheet are not blank, this explains how the combination of the two values should be interpreted, i.e. which of the two moments in time is the beginning of the period described by the timesheet. | CodeTimeEventCombinationType |
| Timesheet | startEvent | A reference to an event (like sunset or sunrise), the occurrence of which indicates when the period described in the timesheet starts. | CodeTimeEventType |
| Timesheet | startDate | The start date of the validity of the timesheet. | Date |
| Timesheet | isExcluded | An indicator that the time block indicated by the timesheet is excluded (subtracted) from the total time interval(s) defined by one or more additional timesheet(s). | Boolean |
| Timesheet | endTimeRelativeEvent | The number of minutes before or after the end event when the period described in the timesheet ends. | TM_Duration |
| Timesheet | endTime | The time of the day when the period described in the timesheet ends. | ClockTime |
| Timesheet | endEventInterpretation | When both the 'EndTime' and 'EndEvent' values of the timesheet are not blank, this attribute explains how the combination of the two attributes should be interpreted, i.e. which of the two moments in time is the end of the period described by the timesheet. | CodeTimeEventCombinationType |
| Timesheet | endEvent | A reference to an event (like sunset or sunrise), the occurrence of which indicates when the period described in the timesheet ends. | CodeTimeEventType |
| Timesheet | endDate | The end date of the validity of the timesheet. | Date |
| Timesheet | dayTil | An indicator of the days affected by the timesheet. | CodeParticularDayType |
| Timesheet | daylightSavingAdjust | Indicates that the startTime and endTime values of the timesheet have to be decreased by one hour when Daylight Saving is in force (summer time). | Boolean |
| Timesheet | day | An indicator of the day the timesheet is referring to. | CodeParticularDayType |
| Timesheet | - | The definition of a single time interval, that occurs repeatedly as part of a schedule. | - |
| TimeRangeType | later | The upper limit of the time range. | DateTime |
| TimeRangeType | earlier | The lower limit of the time range. | DateTime |
| TimeRangeType | - | The area of variation of a time between earlier and later limits. | - |
| TimeConstraint | requiredLanding | The landing event required by the time constraint. | Landing |
| TimeConstraint | requiredOffBlock | The off block event required by the time constraint. | OffBlock |
| TimeConstraint | requiredTakeOff | The take-off event required by the time constraint. | TakeOff |
| TimeConstraint | - | A restriction brought to the time component of the trajectory of an aircraft. | - |
| ThreeDimensionalSurfaceType | verticalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| ThreeDimensionalSurfaceType | verticalDatum | The set of reference points or a mathematical model of the Earth's surface (a datum) against which vertical position measurements are made as basis for measuring elevations. | CodeVerticalDatumType |
| ThreeDimensionalSurfaceType | verticalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| ThreeDimensionalSurfaceType | verticalAccuracy | The difference between the recorded elevation of an entity and its true elevation referenced to the same vertical datum expressed as a linear error at 95 percent probability. | ValDistanceType |
| ThreeDimensionalSurfaceType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| ThreeDimensionalSurfaceType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| ThreeDimensionalSurfaceType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| ThreeDimensionalSurfaceType | geoidUndulation | The distance of the geoid above (positive) or below (negative) the mathematical reference ellipsoid at the location of the surface. | ValDistanceType |
| ThreeDimensionalSurfaceType | elevation | The vertical distance of a point or a level, on or affixed to the surface of the earth, measured from mean sea level. | ValAltitudeType |
| ThreeDimensionalSurfaceType | - | Derived from GM_Surface and extended to include properties that represent the vertical position (elevation, datum, accuracy). | - |
| ThreeDimensionalPointType | verticalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| ThreeDimensionalPointType | verticalDatum | The set of reference points or a mathematical model of the Earth's surface (a datum) against which vertical position measurements are made as basis for measuring elevations. | CodeVerticalDatumType |
| ThreeDimensionalPointType | verticalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| ThreeDimensionalPointType | verticalAccuracy | The difference between the recorded elevation of an entity and its true elevation referenced to the same vertical datum expressed as a linear error at 95 percent probability. | ValDistanceType |
| ThreeDimensionalPointType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| ThreeDimensionalPointType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| ThreeDimensionalPointType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| ThreeDimensionalPointType | height | The vertical distance of a level, a point or an object considered as a point, measured from a specified datum. | ValVerticalDistanceType |
| ThreeDimensionalPointType | geoidUndulation | The distance of the geoid above (positive) or below (negative) the mathematical reference ellipsoid at the location of the point. | ValDistanceType |
| ThreeDimensionalPointType | elevation | The vertical distance of a point or a level, on or affixed to the surface of the earth, measured from mean sea level. | ValAltitudeType |
| ThreeDimensionalPointType | altitude | The vertical distance of a level, a point or an object considered as a point, measured from mean sea level (MSL). | ValAltitudeType |
| ThreeDimensionalPointType | - | Derived from GM_Point and extended to include properties for describing a point with elevation and vertical extent. | - |
| ThreeDimensionalCurveType | verticalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| ThreeDimensionalCurveType | verticalDatum | The set of reference points or a mathematical model of the Earth's surface (a datum) against which vertical position measurements are made as basis for measuring elevations. | CodeVerticalDatumType |
| ThreeDimensionalCurveType | verticalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| ThreeDimensionalCurveType | verticalAccuracy | The difference between the recorded elevation of an entity and its true elevation referenced to the same vertical datum expressed as a linear error at 95 percent probability. | ValDistanceType |
| ThreeDimensionalCurveType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| ThreeDimensionalCurveType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| ThreeDimensionalCurveType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| ThreeDimensionalCurveType | geoidUndulation | The distance of the geoid above (positive) or below (negative) the mathematical reference ellipsoid at the location of the curve. | ValDistanceType |
| ThreeDimensionalCurveType | elevation | The vertical distance of a point or a level, on or affixed to the surface of the earth, measured from mean sea level. | ValAltitudeType |
| ThreeDimensionalCurveType | - | Derived from GM_Curve and extended to include properties that represent the vertical position (elevation, datum, accuracy). | - |
| TerminalArrivalAreaSector | sectorDefinition | A portion of a circle. | CircleSector |
| TerminalArrivalAreaSector | significantObstacle | The obstacle that controls the altitude definition of the sector. | Obstruction |
| TerminalArrivalAreaSector | waypointType | The type of waypoint over or by which the aircraft is required to fly. | CodeInfrastructurePointUsageType |
| TerminalArrivalAreaSector | isCourseReversalRequired | Indication whether a course reversal is required. | Boolean |
| TerminalArrivalAreaSector | altitudeDescription | Indication how the altitude attributes should be interpreted. | CodeAltitudeUseType |
| TerminalArrivalAreaSector | - | Subdivision of the TAA to allow for lower altitudes. The lowest altitude will provide a minimum clearance of 300m (1000ft) above all objects located in the sector. | - |
| TerminalArrivalAltitude | iaf | Initial approach fix used by the TAA. | InfrastructurePoint |
| TerminalArrivalAltitude | if | Intermediate fix used by the TAA. | InfrastructurePoint |
| TerminalArrivalAltitude | approachRNAV | An approach built for use by aircraft with equipment that can determine the location of a point based on the latitude and longitude. | InstrumentApproachProcedure |
| TerminalArrivalAltitude | sector | A subdivision of the TAA designed to provide the lowest altitude possible and maintain safety. | TerminalArrivalAreaSector |
| TerminalArrivalAltitude | outerBufferWidth | The buffer size of the outer arc boundary. | ValDistanceType |
| TerminalArrivalAltitude | lateralBufferWidth | The buffer size of the lateral or inner boundary. | ValDistanceType |
| TerminalArrivalAltitude | arrivalAreaType | The base type of the terminal arrival area. | CodeTAAType |
| TerminalArrivalAltitude | - | The lowest altitude that will provide a minimum clearance of 300 m (1 000 ft) above all objects located in an arc of a circle defined by a 46 km (25 NM) radius centred on the initial approach fix (IAF), or where there is no IAF on the intermediate approach fix (IF), delimited by straight lines joining the extremity of the arc to the IF. The combined TAAs associated with an approach procedure shall account for an area of 360 degrees around the IF. | - |
| Terminal | availability | Information about the operational status of the terminal. | AerodromeAvailability |
| Terminal | gate | A gate at the terminal. | Gate |
| Terminal | numberOfPassengerLevels | Number of levels for passengers at the terminal. | Integer |
| Terminal | numberOfLuggageReclaimDevices | Number of luggage reclaim devices available at the terminal. | Integer |
| Terminal | numberOfGateRooms | Number of gate rooms available at the terminal. | Integer |
| Terminal | numberOfDeparturePassportDesks | Number of departure passport desks available at the terminal. | Integer |
| Terminal | numberOfCustomChannels | Number of custom channels at the terminal. | Integer |
| Terminal | numberOfCheckInDesks | Number of check-in desks available at the terminal. | Integer |
| Terminal | numberOfBagSecurityPoints | Number of bag security points available at the terminal. | Integer |
| Terminal | numberOfArrivalPassportDesks | Number of arrival passport desks available at the terminal. | Integer |
| Terminal | internationalType | The Terminal may be reserved for domestic/national flights or for international flights (Schengen or not). | CodeInternationalFlightType |
| Terminal | designator | A name identifying a terminal. | CharacterString |
| Terminal | description | Free text field used to describe a terminal. | CharacterString |
| Terminal | - | An installation on an aerodrome with facilities for loading and unloading aircraft and processing traffic (passengers, baggage, cargo and mail). | - |
| TemporalEnabledEntity | timesheet | A schedule concerning the entity. | Timesheet |
| TemporalEnabledEntity | startValidity | Date and time at which the data contained in the entity state starts to be effective | DateTime |
| TemporalEnabledEntity | startEntityLifetime | Start of life of the entity, indicating the date and time at which the entity starts to exist | DateTime |
| TemporalEnabledEntity | source | Name of entity or organisation that supplied data. | CharacterString |
| TemporalEnabledEntity | lastRevision | Date and time when the data was last revised. | DateTime |
| TemporalEnabledEntity | interpretation | How the entity state is to be interpreted. | CodeValidityPeriodInterpretationType |
| TemporalEnabledEntity | endValidity | Date and time at which the data contained in the entity state ceases to be effective | DateTime |
| TemporalEnabledEntity | endEntityLifetime | End of life of the entity, indicating the date and time at which the entity ceases to exist | DateTime |
| TemporalEnabledEntity | - | An entity which has a lifecycle, including a start of life, an end of life and various states along its life. | - |
| TelephoneContact | voice | The telephone number by which individuals can speak to the responsible organisation or individual. | CharacterString |
| TelephoneContact | facsimile | The telephone number of a facsimile machine for the responsible organisation or individual. | CharacterString |
| TelephoneContact | - | Telephone numbers at which the organisation or individual may be contacted. | - |
| TaxiwayMarking | markedTaxiway | Taixway that is marked. | Taxiway |
| TaxiwayMarking | markedElement | Taxiway element marked by the taxiway marking. | TaxiwayElement |
| TaxiwayMarking | taxiwayMarkingType | The type of taxiway marking. | CodeTaxiwayMarkingType |
| TaxiwayMarking | - | A symbol or group of symbols displayed on the surface of the taxiway. | - |
| TaxiwayLightSystem | lightedTaxiway | Taxiway lit by the light system. | Taxiway |
| TaxiwayLightSystem | position | A code indicating the part of the taxiway surface the lighting system is serving. | CodeTaxiwaySectionType |
| TaxiwayLightSystem | - | The lighting system provided for a taxiway at an aerodrome. | - |
| TaxiwayIntersectionMarking | markingPattern | The type of marking pattern used at this location | CodeMarkingPatternType |
| TaxiwayIntersectionMarking | holdingSide | Relative location of the holding side of a holding position, from startpoint to endpoint of line | CodeHoldingSideType |
| TaxiwayIntersectionMarking | - | A marking painted at a position at which taxiing aircraft and vehicles are expected to stop and hold until further cleared to proceed, when so instructed by the aerodrome control tower. | - |
| TaxiwayHoldingPositionMarking | markedTaxiwayHoldingPosition | Taxiway holding position that is marked. | TaxiwayHoldingPosition |
| TaxiwayHoldingPositionMarking | taxiwayHoldingPositionMarkingType | The type of taxiway holding position marking. | CodeTaxiwayHoldingPositionMarkingType |
| TaxiwayHoldingPositionMarking | markingPattern | The type of marking pattern used at this location | CodeMarkingPatternType |
| TaxiwayHoldingPositionMarking | holdingSide | Relative location of the holding side of a holding position, from startpoint to endpoint of line | CodeHoldingSideType |
| TaxiwayHoldingPositionMarking | isRunwayEntryLightSystemInstalled | Indicates if Runway Entry Light system is installed at holding position | Boolean |
| TaxiwayHoldingPositionMarking | - | A symbol or group of symbols displayed on the surface of a Taxiway indicating the location of the Taxiway Holding Position. | - |
| TaxiwayHoldingPositionLightSystem | taxiwayHoldingPosition | The taxiway holding position lit by the taxiway holding position light system. | TaxiwayHoldingPosition |
| TaxiwayHoldingPositionLightSystem | type | The kind of lighting aid provided for the taxiway holding position. | CodeLightHoldingPositionType |
| TaxiwayHoldingPositionLightSystem | - | Lighting system for a taxiway hold position. | - |
| TaxiwayHoldingPosition | associatedGuidanceLine | The guidance line containing the taxi holding position. | GuidanceLine |
| TaxiwayHoldingPosition | protectedRunway | Runway protected by the taxi holding position. | Runway |
| TaxiwayHoldingPosition | runwayElement | A runway element associated with the taxiway holding position. | RunwayElement |
| TaxiwayHoldingPosition | taxiwayElement | A taxiway element associated with the taxiway holding position. | TaxiwayElement |
| TaxiwayHoldingPosition | taxiHoldingPositionLightSystem | The LightSystem provided for an TaxiHoldingPosition | TaxiwayHoldingPositionLightSystem |
| TaxiwayHoldingPosition | taxiwayHoldingPositionMarking | The Marking marked on the TaxiHoldingPosition | TaxiwayHoldingPositionMarking |
| TaxiwayHoldingPosition | status | An indication of the operational status of the taxi holding position. | CodeStatusOperationsType |
| TaxiwayHoldingPosition | landingCategory | Type of landing operations for which that holding position is relevant. | CodeInstrumentApproachCategoryType |
| TaxiwayHoldingPosition | - | A designated position at which taxiing aircraft and vehicles must stop and hold position, unless otherwise authorized by the aerodrome control tower. | - |
| TaxiwayElement | suitableAircraft | Aircraft for which this taxiway element is suitable. | AircraftType |
| TaxiwayElement | apronElement | An apron element associated with this taxiway element. | ApronElement |
| TaxiwayElement | deicingArea | A deicing area associated with the taxiway element. | DeicingArea |
| TaxiwayElement | guidanceLine | A guidance line associated with the taxiway element. | GuidanceLine |
| TaxiwayElement | availability | The operational status of the taxiway element. | ManoeuvringAreaAvailability |
| TaxiwayElement | runwayElement | A runway element associated with the taxiway element. | RunwayElement |
| TaxiwayElement | surfaceProperties | Surface characteristics of the taxiway element. | SurfaceCharacteristics |
| TaxiwayElement | associatedTaxiway | The taxiway associated with the taxiway element. | Taxiway |
| TaxiwayElement | taxiwayElement | A taxiway element associated with this taxiway element. | TaxiwayElement |
| TaxiwayElement | taxiwayHoldingPosition | A taxiway holding position associated with the taxiway element. | TaxiwayHoldingPosition |
| TaxiwayElement | taxiwayElementMarking | The Marking marked on the TaxiwayElement | TaxiwayMarking |
| TaxiwayElement | width | The width of the taxiway element. | ValDistanceType |
| TaxiwayElement | type | The type of taxiway element. | CodeTaxiwayElementType |
| TaxiwayElement | length | The length of the taxiway element. | ValDistanceType |
| TaxiwayElement | gradeSeparation | An indication of the placement of the taxiway element at a different height from another element. | CodeGradeSeparationType |
| TaxiwayElement | - | Part of a taxiway. | - |
| TaxiwayContamination | contaminatedTaxiway | The contaminated taxiway | Taxiway |
| TaxiwayContamination | clearedWidth | The width of taxiway cleared of contamination. | ValDistanceType |
| TaxiwayContamination | - | The presence or removal of hazardous conditions due to snow, ice, slush, water, etc. on the taxiway surface. | - |
| Taxiway | contaminant | Taxiway contaminant. | TaxiwayContamination |
| Taxiway | associatedAerodrome | The aerodrome the taxiway is associated with. | Aerodrome |
| Taxiway | deicingArea | Deicing area located on the taxiway | DeicingArea |
| Taxiway | connectingGuidanceLine | A GuidanceLine which connects to the Taxiway | GuidanceLine |
| Taxiway | availability | The operational status of the taxiway. | ManoeuvringAreaAvailability |
| Taxiway | surfaceProperties | Surface characteristics of the taxiway. | SurfaceCharacteristics |
| Taxiway | taxiwayLightSystem | The LightSystem provided for an Taxiway | TaxiwayLightSystem |
| Taxiway | taxiwayMarking | The Marking marked on the Taxiway | TaxiwayMarking |
| Taxiway | taxiwayElement | TaxiwayElement which describes part of the Taxiway | TaxiwayElement |
| Taxiway | widthShoulder | The taxiway shoulder width. | ValDistanceType |
| Taxiway | width | The physical width of the taxiway. | ValDistanceType |
| Taxiway | type | An indication of a type of taxiway. | CodeTaxiwayType |
| Taxiway | length | The length of the taxiway. | ValDistanceType |
| Taxiway | isAbandoned | An indicator that a taxiway is no longer in operational use, but it is still physically present and visible, although usually in a degraded state. | Boolean |
| Taxiway | designator | The textual designator of the taxiway. | CharacterString |
| Taxiway | - | A defined path on a land aerodrome established for the taxiing of aircraft and intended to provide a link between one part of the aerodrome and another, including: a) Aircraft stand taxilane. A portion of an apron designated as a taxiway and intended to provide access to aircraft stands only. b) Apron taxiway. A portion of a taxiway system located on an apron and intended to provide a through taxi route across the apron. c) Rapid exit taxiway. A taxiway connected to a runway at an acute angle and designed to allow landing aeroplanes to turn off at higher speeds than are achieved on other exit taxiways thereby minimizing runway occupancy times. | - |
| TaxiInClearance | taxiPath | The taxi path that is expected to be given as part of the clearance. | RouteTrajectorySegment |
| TaxiInClearance | - | Information relating to the taxi-in clearance of an aircraft. | - |
| TaxiChannel | markingBuoy | A buoy used to mark the taxi channel. | MarkingBuoy |
| TaxiChannel | width | The overall width measurement of the Taxi Channel. | ValDistanceType |
| TaxiChannel | restriction | Any restrictions or cautions associated with the taxi channel. | CharacterString |
| TaxiChannel | name | Any commonly used name associated with the taxi channel. | CharacterString |
| TaxiChannel | length | The overall length measurement of the Taxi Channel. | ValDistanceType |
| TaxiChannel | depth | The depth measurement of the Taxi Channel with respect to mean lowest low tide. | ValVerticalDistanceType |
| TaxiChannel | - | A water channel used for the movement of aircraft between on shore facilities and the water lane. | - |
| TakeOffConfiguration | constraint | A constraint on the flight configuration caused by the operator's configuration. | OperatorConfiguration |
| TakeOffConfiguration | flight | The flight for which the configuration applies. | Flight |
| TakeOffConfiguration | crewMember | Crew member onboard the aircraft. | CrewMember |
| TakeOffConfiguration | takeOffWeight | The weight of the aircraft at the beginning of the take-off phase. | ValMassType |
| TakeOffConfiguration | numberOfTrafficUnits | Number of traffic units for the flight. One traffic unit is equivalent to one passenger or 100Kg air freight or 10 kg air mail. | Integer |
| TakeOffConfiguration | personsOnBoard | The total number of persons (passengers and crew) on board. | Integer |
| TakeOffConfiguration | numberOfPassengers | The number of passenger for the flight. | Integer |
| TakeOffConfiguration | isPassenger | Whether the aircraft has passengers onboard at take-off. | Boolean |
| TakeOffConfiguration | isCargo | Whether the aircraft has cargo onboard at take-off. | Boolean |
| TakeOffConfiguration | estimatedTakeOffWeight | The weight of the aircraft at the beginning of the take-off phase. | ValWeightType |
| TakeOffConfiguration | cargoWeight | The weight of the cargo of the flight. | ValMassType |
| TakeOffConfiguration | - | Aircraft configuration for a given flight. It is the configuration at take-off"." | - |
| TakeOff | time | Time at which the aircraft leaves the ground and becomes airborne. | DateTimeWithPlanningType |
| TakeOff | targetTimeStatus | The status of the target take-off time. | CodeTargetTimeStatusType |
| TakeOff | - | Event in which an aircraft takes-off. | - |
| TACAN | declination | The angular difference between the direction of the 'zero bearing' indicated by the station and the direction of the True North. | Angle |
| TACAN | channel | A code indicating the channel of the TACAN system. | CodeTACANChannelType |
| TACAN | - | A navigation system developed by military and naval forces providing, as far as the navigating pilot is concerned and for suitably equipped aircraft, the same indication as a VOR/DME system. | - |
| SurveillanceRadar | groundStation | The ground station where the radar scope is utilised. | Unit |
| SurveillanceRadar | verticalCoverageAzimuth | Azimuth for which the radar provides vertical coverage. | Angle |
| SurveillanceRadar | verticalCoverageDistance | Distance for which the radar provides vertical coverage. | ValDistanceType |
| SurveillanceRadar | verticalCoverageAltitude | Altitude for which the radar provides vertical coverage. | ValVerticalDistanceType |
| SurveillanceRadar | tiltAngle | Angle at which the antenna is tilted. | Angle |
| SurveillanceRadar | isAntennaTiltFixed | Indication whether the antenna tilt is fixed. | Boolean |
| SurveillanceRadar | automatedRadarTerminalSystem | A system in the air traffic control system using radar intelligence to detect and display pertinent data such as flight identification, altitude, and position of aircraft operating in the terminal area. | CharacterString |
| SurveillanceRadar | - | Radar equipment used to determine the position of an aircraft in range and azimuth. | - |
| SurveillanceGroundStation | isVideoMapAvailable | Indication whether a Video Map is available for the component. | Boolean |
| SurveillanceGroundStation | - | Information about the ground station where the radar scope is utilised. | - |
| SurfaceWeatherObservation | surfaceWeatherObservationSystemType | The type of surface weather observation system. | CodeSurfaceWeatherObservationSystem |
| SurfaceWeatherObservation | - | Surface weather observations provide numerous weather elements, that are observed by a variety of sensors, both measurable (e.g., pressure and temperature) and derived elements (e.g., density altitude). | - |
| SurfaceVehicle | surfaceVehicleType | Type of surface vehicle. | CodeSurfaceVehicleIdentificationType |
| SurfaceVehicle | - | A vehicle (other than aircraft) which may operate in the airport movement area. | - |
| SurfaceContaminationLayer | type | The type of contaminating substance on the movement area surface. | CodeContaminationType |
| SurfaceContaminationLayer | surfaceExtent | Contamination extent. | ThreeDimensionalSurfaceType |
| SurfaceContaminationLayer | layerOrder | The order of the layer (starting from the uppermost, towards the movement area surface), in case overlapping contaminants are present. | Integer |
| SurfaceContaminationLayer | contaminationExtent | The proportion of a runway surface that is contaminated by a contaminant, as a percentage of the total runway area. | CodeValueContaminationExtentType |
| SurfaceContaminationLayer | - | An operationally significant contaminant of homogeneous type such as snow, ice, slush, water, sand, etc., which is present on a large surface of the aerodrome area. | - |
| SurfaceContamination | criticalRidge | A ridge or bank of contaminant that might affect operations. | Ridge |
| SurfaceContamination | layer | A layer of contaminant. | SurfaceContaminationLayer |
| SurfaceContamination | wasCleared | Indication that the surface was cleared. | Boolean |
| SurfaceContamination | proportion | The percentage of the contaminated area of the overall extent of the surface. | Decimal |
| SurfaceContamination | observationTime | The date and time of surface contamination measurement completion. | DateTime |
| SurfaceContamination | nextObservationTime | The date and time of the next intended measurement of conditions on an aerodrome surface. | DateTime |
| SurfaceContamination | isFurtherTotalClearanceExpected | Indicates that further total clearance of an aerodrome surface with contamination is expected. | Boolean |
| SurfaceContamination | isExtremeDesposit | Indication that the surface contamination has extreme consequences. | Boolean |
| SurfaceContamination | isEstimatedSurfaceFrictionUnreliable | Indication that the estimated surface friction is unreliable and is not reported. | Boolean |
| SurfaceContamination | hasObscuredLights | Indicates that the surface lights are obscured by surface contamination. | Boolean |
| SurfaceContamination | furtherClearanceTime | The time when it is expected to complete further clearance of an aerodrome surface with contamination. | DateTime |
| SurfaceContamination | frictionDevice | The type of equipment used to determine the friction coefficient of an aerodrome surface with contamination. | CodeFrictionDeviceType |
| SurfaceContamination | frictionEstimation | A qualitative estimate of the friction on an aerodrome surface with contamination. | CodeFrictionEstimateType |
| SurfaceContamination | frictionCoefficient | The average ratio of the weight of an object being moved along an aerodrome surface with contamination and the force that maintains contact between the object and that surface. | Decimal |
| SurfaceContamination | depth | The depth of the contamination on the surface. | ValDistanceType |
| SurfaceContamination | - | Presence or removal of hazardous conditions on aerodrome movement areas due to snow, ice, slush, water. | - |
| SurfaceCharacteristics | weightSIWL | The maximum calculated load on each tire of a landing gear assembly that a movement area surface can support. | ValMassType |
| SurfaceCharacteristics | weightAUW | The maximum total value of the weight of an aircraft that a movement area surface may support, regardless of the landing gear configuration of the aircraft. | ValMassType |
| SurfaceCharacteristics | tyrePressureSIWL | The maximum aircraft tire pressure that a movement area surface can support. | ValPressureType |
| SurfaceCharacteristics | surfaceCondition | The quality of the surface of an aerodrome surface. | CodeSurfaceConditionType |
| SurfaceCharacteristics | preparation | The preparation technique applied to a surface composition. | CodeSurfacePreparationType |
| SurfaceCharacteristics | pavementTypePCN | The pavement behaviour (rigid or flexible) used for determining the Pavement Classification Number (PCN). | CodePCNPavementType |
| SurfaceCharacteristics | pavementSurfaceClassification | A classification of airfield pavement surfaces for Airport Obstruction Charts. | CodePavementSurfaceClassificationType |
| SurfaceCharacteristics | pavementSubgradePCN | An indication of the pavement subgrade strength related to the Pavement Classification Number (PCN). | CodePCNSubgradeType |
| SurfaceCharacteristics | maxTyrePressurePCN | The maximum allowable tire pressure category related to the Pavement Classification Number (PCN). | CodePCNTyrePressureType |
| SurfaceCharacteristics | evaluationMethodPCN | The method used to rate a runway pavement. | CodePCNMethodType |
| SurfaceCharacteristics | composition | The type of the predominant material of which a surface of the movement area is composed. | CodeSurfaceCompositionType |
| SurfaceCharacteristics | classPCN | The bearing strength of a pavement for unrestricted operations. | Decimal |
| SurfaceCharacteristics | classLCN | A value which denotes the peak bearing moment the surface can handle repeatedly without shortening its service life. | Decimal |
| SurfaceCharacteristics | - | The characteristics of an aerodrome surface. | - |
| State | airspace | Airspace located within the state borders. | Airspace |
| State | city | A city belonging to the state. | City |
| State | border | The border of the state. | GeoBorder |
| State | role | Role of a Country with respect to Nas. | CodeNasRoleType |
| State | isEcacState | Indicates if the Country is one of the ECAC states. | Boolean |
| State | icaoNationalityLetters | Nationality letters as defined by ICAO. | CodeICAONationalityLettersType |
| State | iataCountryCode | Country codes as defined by IATA and ISO. | CodeIATACountryCodeType |
| State | - | An internationally recognized geographic entity that provides air traffic service. | - |
| StartUpClearance | departure | Operations for which the start-up clearance applies. | DepartureOperations |
| StartUpClearance | time | Time at which the Start-Up of the aircraft engines is approved. | DateTimeWithPlanningType |
| StartUpClearance | startUpApprovalRequestTime | Time the pilot requests start up clearance. | DateTimeWithPlanningType |
| StartUpClearance | - | Approval from air traffic control to proceed with the Start-Up. | - |
| StartUp | departure | Operations for which the start-up is executed. | DepartureOperations |
| StartUp | time | Time at which the aircraft starts up. | DateTimeWithPlanningType |
| StartUp | - | The start up of the aircraft engines by the flight crew upon the ATC approval. | - |
| StandMarking | markedStand | Aircraft stand marked by the aircraft stand marking. | AircraftStand |
| StandMarking | aircraftStandMarkingType | The type of aircraft stand marking. | CodeAircraftStandMarking |
| StandMarking | - | A symbol or group of symbols displayed on the surface of the Aircraft Stand. | - |
| StandardLevelTable | name | A code identifying the table of discrete cruising levels. | CodeLevelTableDesignatorType |
| StandardLevelTable | isStandardICAO | An indication whether the table is according to the ICAO SARPS. | Boolean |
| StandardLevelTable | - | A table of consecutive cruising levels described under vertical separation criteria limited by an upper and lower level and used by General Air Traffic. | - |
| StandardLevelSector | applicableAirspace | The airspace into which the standard level sector applies. | Airspace |
| StandardLevelSector | applicableLevelColumn | The standard level column for which the standard level sector applies. | StandardLevelColumn |
| StandardLevelSector | toTrack | The end angle of the sector relative to the North. | Angle |
| StandardLevelSector | fromTrack | The start angle of the sector relative to the North. | Angle |
| StandardLevelSector | flightRule | A code indicating the flight rules observed by the aircraft. | CodeFlightRulesType |
| StandardLevelSector | angleType | A code indicating the direction of the zero bearing. | CodeNorthReferenceType |
| StandardLevelSector | - | The general rule by which standard level columns are used in a national airspace or within a region. | - |
| StandardLevelColumn | levelTable | The standard level table that the standard level column belongs to. | StandardLevelTable |
| StandardLevelColumn | uom | The unit of measure used by the column. | CodeUomLengthType |
| StandardLevelColumn | standardCruisingLevel | A specified cruising level, part of a column within a table of discrete cruising levels used by General Air Traffic. | ValVerticalDistanceType |
| StandardLevelColumn | series | A code identifying the column. | CodeLevelSeriesType |
| StandardLevelColumn | isRvsmApplied | Indication that reduced vertical separation minima is applied in the column. | Boolean |
| StandardLevelColumn | - | A column of consecutive cruising levels within a standard level table. | - |
| StandardInstrumentDeparture | departureClearance | A departure clearance authorising a flight to fly the standard instrument departure. | DepartureClearance |
| StandardInstrumentDeparture | departure | Operations for which the SID is used. | DepartureOperations |
| StandardInstrumentDeparture | isContingencyRoute | Indication whether the standard instrument departure is a contingency route. | Boolean |
| StandardInstrumentDeparture | designator | The designator of the SID. | CharacterString |
| StandardInstrumentDeparture | - | A designated instrument flight rule (IFR) departure route linking the aerodrome or a specified runway of the aerodrome with a specified significant point, normally on a designated ATS route, at which the en-route phase of a flight commences. | - |
| StandardInstrumentArrival | designator | The designator of the STAR. | CharacterString |
| StandardInstrumentArrival | - | A designated instrument flight rule (IFR) arrival route linking a significant point, normally on an ATS route, with a point from which a published instrument approach procedure can be commenced. | - |
| SSRCode | modeSIdentifier | The ICAO aircraft address used in Mode S. | AircraftAddress |
| SSRCode | status | The status of the SSR code. | CodeSSRCodeStatusType |
| SSRCode | modeSType | Type of mode S | CodeModeSType |
| SSRCode | mode | The surveillance system used for the SSR code. | CodeSSRModeType |
| SSRCode | codeCategory | The category of code according to the type of flight. | CodeSSRCategoryType |
| SSRCode | code | Four numerics giving the SSR code assigned to the aircraft by ATS. | CharacterString |
| SSRCode | - | The number assigned to a particular multiple pulse reply signal transmitted by a transponder in Mode A or Mode C. | - |
| SpeedRangeType | upper | The upper limit of the speed range. | ValSpeedType |
| SpeedRangeType | lower | The lower limit of the speed range. | ValSpeedType |
| SpeedRangeType | - | The area of variation of a speed between upper and lower limits. | - |
| SpeedConstraint | - | A restriction brought to the speed component of the trajectory of an aircraft. | - |
| SpecialNavigationSystem | responsibleOrganisation | The organisation responsible for the equipment. | Organisation |
| SpecialNavigationSystem | station | SpecialNavigationStation which provides a service in the SpecialNavigationSystem chain | SpecialNavigationStation |
| SpecialNavigationSystem | type | A code indicating the type of special navigation system. | CodeSpecialNavigationSystemType |
| SpecialNavigationSystem | name | The textual name of the chain of a special navigation system. | CharacterString |
| SpecialNavigationSystem | designator | The designator of a special navigation system chain. | CharacterString |
| SpecialNavigationSystem | - | Wide area (worldwide) navigation systems based on a chain of land or maritime stations providing radio frequency signals which can be used by airborne equipment to determine at least, the mobile two-dimensional position. | - |
| SpecialNavigationStationStatus | operationalStatus | The operational status of the special navigation station. | CodeStatusNavaidType |
| SpecialNavigationStationStatus | - | Information about the status of the special navigation station. | - |
| SpecialNavigationStation | responsibleOrganisation | The organisation responsible for the station. | Organisation |
| SpecialNavigationStation | systemChain | A special navigation system chain to which the station belongs. | SpecialNavigationSystem |
| SpecialNavigationStation | availability | The operational status of the special navigation station. | SpecialNavigationStationStatus |
| SpecialNavigationStation | type | A code indicating the type of service within the chain. | CodeSpecialNavigationStationType |
| SpecialNavigationStation | name | The textual name of the station. | CharacterString |
| SpecialNavigationStation | frequency | The value of the emission frequency. | ValFrequencyType |
| SpecialNavigationStation | emission | A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference. | CodeRadioEmissionType |
| SpecialNavigationStation | - | A land based station of a special navigation system. | - |
| SpecialDate | organisation | The organisation that observes the special date. | Organisation |
| SpecialDate | type | The kind of special date. | CodeParticularDayType |
| SpecialDate | name | The name by which the date is known by the public (especially for public holidays). | CharacterString |
| SpecialDate | dateYear | The year concerned. | Date |
| SpecialDate | dateDay | The calendar date concerned. | Date |
| SpecialDate | - | A calendar date that has a special meaning for a particular state or organisation. | - |
| SpaceWeather | - | The physical and phenomenological state of the natural space environment, including the Sun and the interplanetary and planetary environments. | - |
| SolarRadiation | solarRadiatiionStormLevelScale | The correlation of solar radiation storm related space weather events with their likely effects on technological systems. | CodeSpaceWeatherScaleType |
| SolarRadiation | solarRadiationProtonFlux | The amount of solar energetic protons passing through a specified area in a given time period. | ValParticleFluxType |
| SolarRadiation | - | Electromagnetic radiation emitted by the Sun with a spectrum close to the one of a black body with a temperature of 5770 K. The radiation peaks in visible wavelengths. When compared to the terrestrial radiation it is often referred to as shortwave radiation. | - |
| SolarFlare | xRayFlux | The amount of solar x-rays passing through a specified area in a given time period. | ValEnergyFluxType |
| SolarFlare | solarFlareRadioBlackoutScale | The correlation of the radio blackout related space weather events with their likely effects on technological systems. | CodeSpaceWeatherScaleType |
| SolarFlare | - | Bright eruption from the Sun's chromosphere. Solar flares are classified in terms of the area of chromosphere affected, the duration of the phenomenon, and the width of the Ha line of hydrogen, on a scale ranging from 1- (minor eruption) to 3+ (very large eruption). | - |
| SimplifiedDirectionalFacility | trueBearing | The measured angle between the localizer beam and True North at the localizer antenna. | Angle |
| SimplifiedDirectionalFacility | magneticBearing | The measured angle between the localizer beam and Magnetic North at the localizer antenna. | Angle |
| SimplifiedDirectionalFacility | frequency | The frequency of the localizer. | ValFrequencyType |
| SimplifiedDirectionalFacility | - | A radio navigation aid providing a final approach course similar to, but less precise than, that of the ILS localizer. | - |
| SignificantPoint | pointReference | The location of a significant point defined using a combination of angles and distances based on the navaid system, radar system or special navigation system. | PointReference |
| SignificantPoint | designatorType | The rules by which the significant point designator has been created. | CodeSignificantPointDesignatorType |
| SignificantPoint | designator | The coded identifier of the significant point. | CharacterString |
| SignificantPoint | - | A specified geographical location used in defining an ATS route or the flight path of an aircraft and for other navigation and ATS purposes. | - |
| ServiceProviderCallsign | language | A code indicating the language in which the service is provided on a particular frequency, as associated with a particular call-sign. | LanguageCode |
| ServiceProviderCallsign | callSign | The full textual service provider identification or call-sign for a particular frequency. | CharacterString |
| ServiceProviderCallsign | - | Information about the operational identifier by which the provider of the service is called and the language used. | - |
| ServiceOperationalStatus | operationalStatus | Indication of the operational capability of the service. | CodeStatusServiceType |
| ServiceOperationalStatus | - | The operational status of the service. | - |
| Service | radioCommunication | The radio frequency on which the service is provided. | RadioCommunicationChannel |
| Service | groundCommunication | The point of contact on the ground for the service. | ContactInformation |
| Service | serviceProvider | The unit that provides the service. | Unit |
| Service | availability | The operational status of the service. | ServiceOperationalStatus |
| Service | callSign | The callsign of the unit providing the service. | ServiceProviderCallsign |
| Service | rank | The order of priority of the service, such as primary" or "alternate". " | CodeFacilityRankingType |
| Service | name | A free text name by which the service is identified. | CharacterString |
| Service | isCompliantICAO | A code indicating whether the service is compliant with the ICAO standards and recommended practices specified for this type of service. | Boolean |
| Service | flightOperations | The destination (arriving, departing, etc.) of the flights for which the information is provided. | CodeFlightServiceAvailabilityType |
| Service | - | The provision of tangible goods, information, instructions or guidance. | - |
| SeparationMode | arrivalSeparationMode | Arrival separation mode (distance based or time based separation) used for arrival sequence. | CodeArrivalSeparationModeType |
| SeparationMode | - | An approved set of rules, procedures and conditions of application associated with separation minima. | - |
| SeparationMinima | separationMode | The separation mode with which the separation minima are associated. | SeparationMode |
| SeparationMinima | - | The minimum displacements between an aircraft and a hazard which maintain the risk of collision at an acceptable level of safety. | - |
| SegmentLeg | aircraftCategory | The aircraft category for which the segment leg is valid. | AircraftCategory |
| SegmentLeg | startTerminalSegmentPoint | The point used to indicate the beginning of a segment. | InfrastructurePoint |
| SegmentLeg | endTerminalSegmentPoint | The point used to indicate the end of a segment. | InfrastructurePoint |
| SegmentLeg | arcCentre | The center point used to define an arc. | InfrastructurePoint |
| SegmentLeg | holding | Established holding used on a procedure. | HoldingProcedure |
| SegmentLeg | angle | The angle defined to limit aircraft trajectory. | AngleIndication |
| SegmentLeg | designSurface | An evaluation area used when designing a procedure segment to insure safety of aircraft. | ObstacleAssessmentArea |
| SegmentLeg | distance | The distance defined to limit aircraft trajectory. | DistanceIndication |
| SegmentLeg | verticalAngle | The vertical climb angle of the aircraft on the procedure leg. | Angle |
| SegmentLeg | upperLimitAltitude | The upper limit altitude. | ValVerticalDistanceType |
| SegmentLeg | turnDirection | The direction of the turn. | CodeDirectionTurnType |
| SegmentLeg | speedReference | A code indicating the reference system for a speed value. | CodeSpeedReferenceType |
| SegmentLeg | speedLimit | The value of the speed limit on the procedure leg. | ValSpeedType |
| SegmentLeg | speedInterpretation | Indication how the speed attribute of a procedure leg should be interpreted. | CodeAltitudeUseType |
| SegmentLeg | lowerLimitAltitude | The lower limit altitude. | ValVerticalDistanceType |
| SegmentLeg | length | The length of the segment. | ValDistanceType |
| SegmentLeg | legType | The type of 'path and terminator' as given in ARINC Specification 424, Attachment 5, Path and Terminator. | CodeSegmentPathType |
| SegmentLeg | legPath | The type of flight path. | CodeLegPathType |
| SegmentLeg | isProcedureTurnRequired | Indication whether a procedure turn is required at the end of the segment leg. | Boolean |
| SegmentLeg | endConditionDesignator | An indication of the event that allows identifying the end of the leg and the start of the next leg on the procedure. | CodeSegmentTerminationType |
| SegmentLeg | duration | The duration of the segment. | TM_Duration |
| SegmentLeg | courseType | A code indicating the type of course to be observed. | CodeCourseType |
| SegmentLeg | courseDirection | The flight direction to/from the navaid providing the course guidance. | CodeRelativeDirectionType |
| SegmentLeg | course | The value of the course angle. | Angle |
| SegmentLeg | bankAngle | The recommended bank angle of the aircraft on the turn. | Angle |
| SegmentLeg | altitudeOverrideATC | Alternate altitude when directed by Air Traffic Control. | ValVerticalDistanceType |
| SegmentLeg | altitudeInterpretation | A code indicating how the altitude attributes of a procedure leg should be interpreted. | CodeAltitudeUseType |
| SegmentLeg | - | A part of an instrument or visual flight procedure defined by two consecutive significant points. | - |
| SecondarySurveillanceRadar | transponder | The transponder mode. | CodeTransponderType |
| SecondarySurveillanceRadar | isMonopulse | Indication whether the SSR is monopulse radar. | Boolean |
| SecondarySurveillanceRadar | isAutonomous | Indication whether the SSR is autonomous. | Boolean |
| SecondarySurveillanceRadar | - | A surveillance radar system which uses transmitters/receivers (interrogators) and transponders. | - |
| SearchAndRescueService | clientAirspace | The airspace where the search and rescue service is available. | Airspace |
| SearchAndRescueService | clientRoute | The route for which the search and rescue service is provided. | RoutePortion |
| SearchAndRescueService | type | The type of search ad rescue service provided. | CodeServiceSARType |
| SearchAndRescueService | - | The performance of distress monitoring, communication, coordination and search and rescue functions, initial medical assistance or medical evacuation, through the use of public and private resources, including cooperating aircraft, vessels and other craft and installations. | - |
| SeaplaneRampSite | seaplaneLandingArea | The SeaplaneLandingArea associated with the SeaplaneRampSite | SeaplaneLandingArea |
| SeaplaneRampSite | guidanceLine | A centreline providing guidance on the seaplane ramp. | SeaplaneRampCentreline |
| SeaplaneRampSite | width | A measurement of the width of the Seaplane Ramp Site. | ValDistanceType |
| SeaplaneRampSite | slope | A measurement of the slope of the Seaplane Ramp Site. | ValDistanceType |
| SeaplaneRampSite | name | Any commonly used name associated with the Seaplane Ramp Site. | CharacterString |
| SeaplaneRampSite | - | Ramps specifically designed to transit seaplanes from land to water and vice versa. | - |
| SeaplaneRampCentreline | name | Any commonly used name associated with the Seaplane Ramp Centerline. | CharacterString |
| SeaplaneRampCentreline | length | The length measurement of the Seaplane Ramp Centerline from the water to the shoreline. | ValDistanceType |
| SeaplaneRampCentreline | - | The centerline of ramps specifically designed to transit seaplanes to or from land or water. | - |
| SeaplaneLandingArea | associatedAerodrome | The aerodrome the seaplane landing area is associated with. | Aerodrome |
| SeaplaneLandingArea | anchorageArea | An anchorage area at the seaplane landing area. | AnchorageArea |
| SeaplaneLandingArea | dockingArea | A docking area used by the seaplane landing area. | DockingArea |
| SeaplaneLandingArea | dockSite | Seaplane landing area dock site. | FloatingDockSite |
| SeaplaneLandingArea | availability | The operational status of the seaplane landing area. | ManoeuvringAreaAvailability |
| SeaplaneLandingArea | markingBuoy | A buoy used to mark the SeaplaneLandingArea | MarkingBuoy |
| SeaplaneLandingArea | taxiChannel | A taxi channel used at the seaplane landing area. | TaxiChannel |
| SeaplaneLandingArea | turningBasin | A turning basin used at the seaplane landing area. | TurningBasin |
| SeaplaneLandingArea | waterLaneEnd | A water lane end used for take-off and landing. | WaterLaneEnd |
| SeaplaneLandingArea | rampSite | Landing area ramp site location. | SeaplaneRampSite |
| SeaplaneLandingArea | width | The overall width measurement of the seaplane landing area to the nearest 5 feet. | ValDistanceType |
| SeaplaneLandingArea | tidalRange | The calculated height difference between the mean low tide and the mean high tide. | ValDistanceType |
| SeaplaneLandingArea | name | Name of the feature water body (river/lake). | CharacterString |
| SeaplaneLandingArea | length | The overall length measurement of the seaplane landing area to the nearest 5 feet. | ValDistanceType |
| SeaplaneLandingArea | currentFlowRate | The measured current flow rate in the Water Operating Area. | ValSpeedType |
| SeaplaneLandingArea | currentFlowCardinalDirection | Code indicating the cardinal compass location of the turning basin from centroid of the water lane end. | CodeCompassPointType |
| SeaplaneLandingArea | coordinatedUseActivityLevel | The amount of activity based on percentage of daily use of the primary coordinated use type. If coordinated use type is multiple provide the largest activity level of the single most expected activity. | Integer |
| SeaplaneLandingArea | coordinatedUse | The primary coordinated use of the waterway. | CodeWaterOperatingAreaCoordinatedUseType |
| SeaplaneLandingArea | - | A defined area on water at an aerodrome prescribed for the landing and take-off of seaplanes. | - |
| SeaCondition | sea | The sea which is subject to observation or forecast. | Sea |
| SeaCondition | seaState | The state of agitation of the sea resulting from various factors such as wind, swell, currents, angle between swell and wind, etc. | CodeSeaStateType |
| SeaCondition | - | Weather observations or forecasts over a defined area of sea. | - |
| Sea | - | Large body of (salt-) water which can have a high meteorological impact on air-traffic taking place above it. | - |
| SatelliteWeatherObservingSystem | weatherSatelliteOrbitType | The weather satellite's orbit. | CodeWeatherSatelliteOrbitType |
| SatelliteWeatherObservingSystem | - | Weather satellites transmit visible imagery for daytime observing, infrared photos for both day and night observing and water vapor imagery that identify locations of moist and dry air (important for thunderstorm forecasting). Satellite imagery and data are also detection sources of convection, volcanic ash, ceiling, and fog products used in flight planning. | - |
| SafeAltitudeAreaSector | sectorDefinition | A portion of a circle. | CircleSector |
| SafeAltitudeAreaSector | significantObstacle | The obstacle that controls the altitude definition of the sector. | Obstruction |
| SafeAltitudeAreaSector | bufferWidth | Width of the secondary area used to evaluate the lowest usable altitude for obstacle assessment. | ValDistanceType |
| SafeAltitudeAreaSector | - | Subdivision of the Minimum Sector Altitudes to allow for lower altitudes. | - |
| SafeAltitudeArea | centrePoint | The point used to build the safe altitude area. | InfrastructurePoint |
| SafeAltitudeArea | location | The localisation of the safe altitudes area at a specific aerodrome. | Aerodrome |
| SafeAltitudeArea | sector | A subdivision of the safe altitude area designed to provide the lowest altitude possible and maintain safety. | SafeAltitudeAreaSector |
| SafeAltitudeArea | safeAreaType | The type of area. | CodeSafeAltitudeType |
| SafeAltitudeArea | - | A set of Minimum Sector Altitudes which completely describe an area centred on a significant point, usually contained within a sector of 46km (25NM) radius. | - |
| RunwayVisualRangeSystem | rvr | The RVR provided by the runway visual range system. | RunwayVisualRange |
| RunwayVisualRangeSystem | readingPosition | The position along the runway direction for which the Runway Visual Range (RVR) reading is provided. | CodeRVRReadingType |
| RunwayVisualRangeSystem | - | A meteorological equipment providing information about the distance over which the pilot of an aircraft on the centre line of a runway can see the runway surface markings or the lights delineating the runway or identifying its centre line. | - |
| RunwayVisualRange | associatedRunwayDirection | The runway direction for which the RVR is specified. | RunwayDirection |
| RunwayVisualRange | rvrValueInterpretation | The relational operator that can be used for interpreting the RVR value, for instance in order to express a mean RVR of at least 2000 meters (ABOVE 2000 meters). | CodeValueInterpretationType |
| RunwayVisualRange | rvrValue | Value of the Runway Visual Range. | ValDistanceType |
| RunwayVisualRange | rvrTendency | When instrumented systems are used for the assessment of runway visual range, the variations in runway visual range during the 10-minute period immediately preceding the observation. | CodeRVRTendencyType |
| RunwayVisualRange | - | The range over which the pilot of an aircraft on the centre line of a runway can see the runway surface markings or the lights delineating the runway or identifying its centre line. | - |
| RunwaySectionContamination | contaminatedRunway | The contaminated runway. | Runway |
| RunwaySectionContamination | section | Indicates the part of the runway that is affected. This supports indicating the contamination information on each third of the runway length, starting from the threshold of the runway direction having the lower designation number. | CodeRunwaySectionType |
| RunwaySectionContamination | - | The presence or removal of hazardous conditions due to snow, ice, slush, water, etc. on a section of the runway surface. | - |
| RunwaySafetyArea | determinationDate | The date the RSA determination was approved. | DateTime |
| RunwaySafetyArea | determination | A formal declaration of the RSA condition with respect to standards and any requirement improvements. | CharacterString |
| RunwaySafetyArea | - | A defined surface surrounding the runway prepared or suitable for reducing the risk of damage to airplanes in the event of an undershoot, overshoot, or excursion from the runway. | - |
| RunwayProtectAreaLightSystem | lightedArea | The protection area lit by the runway project area light system. | RunwayProtectArea |
| RunwayProtectAreaLightSystem | position | An indication of the part of the runway served by the runway protect area lighting system. | CodeProtectAreaSectionType |
| RunwayProtectAreaLightSystem | - | The lighting for the runway protect area. | - |
| RunwayProtectArea | protectedRunwayDirection | The runway direction protected by the protection area. | RunwayDirection |
| RunwayProtectArea | runwayElement | The runway element which contains the runway protect area. | RunwayElement |
| RunwayProtectArea | runwayProtectAreaLightSystem | The light system provided for a runway protect area. | RunwayProtectAreaLightSystem |
| RunwayProtectArea | type | A type of runway protect area. | CodeRunwayProtectionAreaType |
| RunwayProtectArea | status | The operational status of an aerodrome movement area, as a category. | CodeStatusOperationsType |
| RunwayProtectArea | name | The name of the Runway Protection Area. | CharacterString |
| RunwayProtectArea | - | An area situated in the vicinity of a runway or provided to protect aircraft during manoeuvring, take-off and landing operations. | - |
| RunwayMarking | runwayCentrelinePoint | The runway centreline point marked. | InfrastructurePoint |
| RunwayMarking | markedRunway | Runway that is marked. | Runway |
| RunwayMarking | protectedRunway | The runway protected by the runway markings. | Runway |
| RunwayMarking | runwayBlastPad | TThe runway blast pad the runway markings. | RunwayBlastPad |
| RunwayMarking | landingDirection | The runway direction marked by the runway markings. | RunwayDirection |
| RunwayMarking | runwayElement | The runway element having the runway markings. | RunwayElement |
| RunwayMarking | protectedTaxiway | The taxiway protected by the runway markings. | Taxiway |
| RunwayMarking | runwayProtectArea | The runway protect area marked by the runway markings. | RunwayProtectArea |
| RunwayMarking | runwayMarking | A section of runway marking which forms part of a larger marking. | RunwayMarking |
| RunwayMarking | runwayMarkingType | The type of runway marking. | CodeRunwayMarkingType |
| RunwayMarking | - | A symbol or group of symbols displayed on the surface of the runway in order to convey aeronautical information. | - |
| RunwayExitLine | runway | The runway served by the exit line | Runway |
| RunwayExitLine | exitType | Type of runway exit. | CodeRunwayExitType |
| RunwayExitLine | - | Guidance line painted on the runway exit. | - |
| RunwayElement | runwayCentrelinePoint | The runway centreline point. | InfrastructurePoint |
| RunwayElement | guidanceLine | A guidance line associated with the runway element. | GuidanceLine |
| RunwayElement | availability | The operational status of the runway element. | ManoeuvringAreaAvailability |
| RunwayElement | associatedRunway | Runway associated with the element. | Runway |
| RunwayElement | runwayDirection | The RunwayDirection whose start is characterised by the RunwayElement | RunwayDirection |
| RunwayElement | taxiwayElement | A taxiway element associated with the runway element. | TaxiwayElement |
| RunwayElement | runwayElement | A runway element associated with this runway element. | RunwayElement |
| RunwayElement | surfaceProperties | Surface characteristics of the runway element. | SurfaceCharacteristics |
| RunwayElement | width | The width of the runway element. | ValDistanceType |
| RunwayElement | type | The type of runway element. | CodeRunwayElementType |
| RunwayElement | length | The length of the runway element. | ValDistanceType |
| RunwayElement | gradeSeparation | An indicator of the placement of the element at a different height from another element. | CodeGradeSeparationType |
| RunwayElement | - | A portion of a runway. | - |
| RunwayDirectionLightSystem | associatedRunwayDirection | Runway direction associated with the runway direction light system. | RunwayDirection |
| RunwayDirectionLightSystem | runwayStatusLightType | The type of runway status lights (RWSL). | CodeRunwayStatusLightsType |
| RunwayDirectionLightSystem | runwayEdgeLightingType | The type of runway edge lighting. | CodeRunwayEdgeLightingType |
| RunwayDirectionLightSystem | position | A indication of the part of the runway served by the runway direction lighting system. | CodeRunwaySectionType |
| RunwayDirectionLightSystem | inRunwayLightingType | The type of In-Runway lighting. | CodeInRunwayLightingType |
| RunwayDirectionLightSystem | category | The category of runway lights. | CodeRunwayLightingCategoryType |
| RunwayDirectionLightSystem | - | The lighting system provided for a landing and take-off direction, including the stopway lights. | - |
| RunwayDirection | suitableAircraft | Aircraft for which this runway direction is suitable. | AircraftType |
| RunwayDirection | runwayCentrelinePoint | The centre line point of the runway direction. | InfrastructurePoint |
| RunwayDirection | capacity | The capacity of the runway direction. | Capacity |
| RunwayDirection | approachLightingSystem | The LightSystem provided for an RunwayDirection | ApproachLightingSystem |
| RunwayDirection | arrestingGear | The arresting gear used on the runway direction. | ArrestingGear |
| RunwayDirection | availability | The operational status of the runway direction. | ManoeuvringAreaAvailability |
| RunwayDirection | usedRunway | The runway used by the runway direction. | Runway |
| RunwayDirection | runwayBlastPad | A runway blast pad used on the runway direction. | RunwayBlastPad |
| RunwayDirection | dependentRunwayDirection | A dependent runway direction. | RunwayDirection |
| RunwayDirection | rvr | The runway visual range. | RunwayVisualRange |
| RunwayDirection | runwayProtectArea | The ProtectArea protecting the RunwayDirection | RunwayProtectArea |
| RunwayDirection | runwayDirectionLightSystem | The LightSystem provided for an RunwayDirection | RunwayDirectionLightSystem |
| RunwayDirection | visualGlideSlopeIndicator | The VisualGlideSlopeIndicator which provides guidance for the RunwayDirection. | VisualGlideSlopeIndicator |
| RunwayDirection | navaid | The navaid installed at a particular landing area. | RadioNavigationService |
| RunwayDirection | startingElement | The runway element that starts the runway direction. | RunwayElement |
| RunwayDirection | trueBearingAccuracy | The accuracy of the measured angle between the runway direction and true north at a given position. | Angle |
| RunwayDirection | trueBearing | The measured angle between the runway direction and true north at a given position. | Angle |
| RunwayDirection | touchDownZoneSlope | Touchdown zone longitudinal slope (slope of 1/3 of the runway length from threshold or first 3000 feet for runways longer than 9000 feet) for a runway direction. | Decimal |
| RunwayDirection | touchDownZoneElevationAccuracy | The accuracy of the reported touch down zone elevation of runway direction. | ValDistanceType |
| RunwayDirection | touchDownZoneElevation | The highest elevation of the runway touch down zone for a runway direction. | ValVerticalDistanceType |
| RunwayDirection | thresholdToThresholdGradientSlope | Threshold to threshold gradient slope. | Decimal |
| RunwayDirection | precisionApproachGuidance | Degree to which navigation aids provide accurate approach guidance for a runway direction. | CodeInstrumentRunwayType |
| RunwayDirection | patternVFR | The direction of the VFR flight pattern at an aerodrome for a runway direction. | CodeDirectionTurnType |
| RunwayDirection | magneticBearing | The measured angle between the runway direction and magnetic north at a given position. | Angle |
| RunwayDirection | isUsedForInstrumentFlightRuleProcedures | Indicates that the runway is used for Instrument Flight Rule procedures. | Boolean |
| RunwayDirection | isStraightInNightOperations | isStraightInNightOperations of type Boolean Definition: An indicator used to identify an approach end of a runway expected to support instrument night operations, serving approach Category A and B aircraft only. " | Boolean |
| RunwayDirection | isRightHandTrafficPattern | An indicator used to identify if there is a right hand traffic pattern for the landing aircraft. | Boolean |
| RunwayDirection | isPositiveVerticalGuidance | An indicator used to identify an approach end of a runway expected to accommodate approaches with vertical guidance. | Boolean |
| RunwayDirection | displacedThresholdApproachRatio | The distance of the controlling obstruction from the runway end (minus 200 feet for hard surface runways) in ratio to the height of the controlling obstruction above the runway end. | Scale |
| RunwayDirection | designator | A designator for one of the two possible landing and/or take-off directions of a runway or final approach and take-off area. | CharacterString |
| RunwayDirection | approachMarkingType | The type of runway direction marking related to landing categories. | CodeApproachMarkingType |
| RunwayDirection | approachMarkingCondition | The quality of the runway marking. | CodeMarkingConditionType |
| RunwayDirection | - | One of the two possible landing and/or take-off directions of a runway or Final Approach and Take-off Area (FATO). | - |
| RunwayDeclaredDistance | runwayCentrelinePoint | The runway centreline point marking the declared distance. | InfrastructurePoint |
| RunwayDeclaredDistance | type | The type of a conventional operational distance declared for a runway direction. | CodeDeclaredDistanceType |
| RunwayDeclaredDistance | distanceAccuracy | The accuracy of the value of a conventional operational distance declared for a runway direction. | ValDistanceType |
| RunwayDeclaredDistance | distance | The conventional operational distance declared for a runway direction. | ValDistanceType |
| RunwayDeclaredDistance | - | A conventional operational distance declared for a runway direction. | - |
| RunwayContamination | contaminatedRunway | The contaminated runway. | Runway |
| RunwayContamination | obscuredLightsSide | Indicates the side of the runway on which the lights are obscured by contamination. | CodeRelativePositionType |
| RunwayContamination | isTaxiwayAvailable | An indication that there are cleared taxiways available serving that runway. | Boolean |
| RunwayContamination | isApronAvailable | An indication that there are cleared aprons available serving a runway. | Boolean |
| RunwayContamination | furtherClearanceWidth | Width of runway that is expected to be cleared of contamination, if less than the total width. | ValDistanceType |
| RunwayContamination | furtherClearanceLength | Length of runway that is expected to be cleared of contamination, if less than the total length. | ValDistanceType |
| RunwayContamination | clearedSide | Indicates that the cleared width is offset left or right of a runway centre line. | CodeRelativePositionType |
| RunwayContamination | clearedWidth | Width of runway cleared of contamination, if less than the total width. | ValDistanceType |
| RunwayContamination | clearedLengthBegin | The distance from the threshold of the runway direction having the lowest designator number to the point where the cleared portion starts, in case of partial clearance. | ValDistanceType |
| RunwayContamination | clearedLength | Length of runway cleared of contamination, if less than the total length of the runway. | ValDistanceType |
| RunwayContamination | - | The presence or removal of hazardous conditions due to snow, ice, slush, water, etc. on the runway surface. | - |
| RunwayCondition | runway | The runway which is subject to observation or forecast. | Runway |
| RunwayCondition | rvr | The observed or forecast runway visual range. | RunwayVisualRange |
| RunwayCondition | temperature | The temperature measured by a probe under the runway surface at the touchdown (TDZ) zone. | ValTemperatureType |
| RunwayCondition | qfe | Atmospheric pressure at runway threshold elevation. A pressure type altimeter calibrated in accordance with the Standard Atmosphere, when set to a QFE altimeter setting using this particular pressure value, will indicate the height above the touch-down zone of the runway. | ValPressureType |
| RunwayCondition | - | Weather observations and / or forecasts related to a runway. May be defined for single or multiple runways. | - |
| RunwayBlastPad | runwayProtectArea | A runway protect area associated with the runway blast pad. | RunwayProtectArea |
| RunwayBlastPad | runwayElement | The runway element which contains the blast pad. | RunwayElement |
| RunwayBlastPad | usedRunwayDirection | The runway direction containing the blast pad. | RunwayDirection |
| RunwayBlastPad | surfaceProperties | Surface properties of the blast pad. | SurfaceCharacteristics |
| RunwayBlastPad | width | The total width of the blast pad surface. | ValDistanceType |
| RunwayBlastPad | status | The operational status of an aerodrome movement area related directly to the runway blast pad. | CodeStatusOperationsType |
| RunwayBlastPad | length | The overall length of a barrier used to divert and/or dissipate jet and/or propeller blast. | ValDistanceType |
| RunwayBlastPad | - | Specially prepared surface placed adjacent to the end of a runway to eliminate the erosive effect of the high wind forces produced by airplanes at the beginning of their take-off rolls. | - |
| Runway | overallContaminant | Runway contaminant. | RunwayContamination |
| Runway | areaContaminant | Area contamination of a runway. | RunwaySectionContamination |
| Runway | associatedAerodrome | The aerodrome the runway is associated with. | Aerodrome |
| Runway | radarSystem | Radar sytem serving the runway. | RadarSystem |
| Runway | surfaceProperties | Surface characteristics of the runway. | SurfaceCharacteristics |
| Runway | touchDownLiftOff | The TouchDownLiftOff area of a Runway of type FATO | TouchDownLiftOff |
| Runway | runwayMarking | The Marking marked on the Runway | RunwayMarking |
| Runway | protectingTaxiHoldingPosition | A TaxiHoldingPosition which prevents the entry on the Runway | TaxiwayHoldingPosition |
| Runway | runwayDirection | One landing and take-off direction of a Runway | RunwayDirection |
| Runway | runwayElement | The RunwayElement which belongs to the Runway | RunwayElement |
| Runway | widthStrip | The physical width of the strip. | ValDistanceType |
| Runway | widthShoulder | The runway shoulder width. | ValDistanceType |
| Runway | widthOffset | A value specifying the lateral offset of the strip, when it is not symmetrically extended beyond the two runway edges. | ValDistanceType |
| Runway | widthAccuracy | Accuracy of the value of the physical width of the runway. | ValDistanceType |
| Runway | type | The type of runway. | CodeRunwayType |
| Runway | nominalWidth | The declared transversal extent of the runway for operational (performance) calculations. | ValDistanceType |
| Runway | nominalLength | The declared longitudinal extent of the runway for operational (performance) calculations. | ValDistanceType |
| Runway | lengthStrip | The physical length of the strip. | ValDistanceType |
| Runway | lengthOffset | A value specifying the longitudinal offset of the strip, when it is not symmetrically extended beyond the two runway ends. | ValDistanceType |
| Runway | lengthAccuracy | Accuracy of the value of the physical length of the runway. | ValDistanceType |
| Runway | isMilitaryAssaultStrip | An indicator used to identify if the runway is a military assault strip. | Boolean |
| Runway | isAbandoned | An indicator that the surface is no longer in operational use, but is still physically present and visible, although usually in a degraded state. | Boolean |
| Runway | designator | The designator of a runway, used to uniquely identify it at an aerodrome. | CharacterString |
| Runway | - | A defined rectangular area on a land aerodrome prepared for the landing and take-off of aircraft. | - |
| RulesProcedures | affectedArea | Airspace within which the rule or procedure is applicable. | Airspace |
| RulesProcedures | affectedLocation | Aerodrome where the rule or procedure is effective. | Aerodrome |
| RulesProcedures | title | A general heading by which the rule or procedure is usually identified in the Aeronautical Information Publications (AIP) or similar/related documents. | CodeRuleProcedureTitleType |
| RulesProcedures | content | The definition of the actual content of the rule or procedure. | CharacterString |
| RulesProcedures | category | An indication of the purpose of the rule or procedure. | CodeRuleProcedureType |
| RulesProcedures | - | An instruction or regulation that needs to be considered by personnel involved in flight operations in relation with an aerodrome or an airspace. | - |
| RouteTrajectorySegment | procedure | The procedure used by the trajectory element. | Procedure |
| RouteTrajectorySegment | route | The route used by the trajectory element. | Route |
| RouteTrajectorySegment | routePortion | The route portion used by the trajectory element. | RoutePortion |
| RouteTrajectorySegment | routeSegment | The published route segment on which the trajectory segment is based. | RouteSegment |
| RouteTrajectorySegment | taxiInClearance | The clearance giving the cleared taxi path. | TaxiInClearance |
| RouteTrajectorySegment | alternateAerodrome | Alternate aerodrome applicable to this trajectory element. | Aerodrome |
| RouteTrajectorySegment | startPoint | The starting point of the trajectory segment. | RouteTrajectoryPoint |
| RouteTrajectorySegment | endPoint | The ending point of the route trajectory segment. | RouteTrajectoryPoint |
| RouteTrajectorySegment | specialRequirements | Applicable special requirements to this trajectory element. This is an indicator that the flight is expected to be operating in accordance with regulations issued by the relevant State for aircraft operating as State aircraft, as per Article 3 of the Convention on International Civil Aviation (Doc 7300) and for aircraft operating in accordance with State regulations for non-standard flying activities, normally through the use of reserved airspace. | CharacterString |
| RouteTrajectorySegment | rateOfClimbDescent | Average rate of climb and descent for the leg (ft per minute), derived from rateOfAltitudeChange of the two Waypoints delimiting the FlightSegment. | Integer |
| RouteTrajectorySegment | mainEnginesFuelBurn | The amount of fuel burn of the main engines during the flight segment. | Decimal |
| RouteTrajectorySegment | type | The type of TrajectorySegment. | CodeRouteTrajectorySegmentType |
| RouteTrajectorySegment | fuelBurnRate | Average Fuel burn rate for the leg. Derived from the deltaFuelBurn for the WayPoints delimiting the FlightSegment. | Number |
| RouteTrajectorySegment | fuelBurn | The fuelBurn for the FlightSegment, expressed in kg. | Number |
| RouteTrajectorySegment | flightRules | The regulation, or combination of regulations, that governs all aspects of operations under which the pilot plans to fly that trajectory element. | CodeFlightRulesType |
| RouteTrajectorySegment | exceedLength | A value used to indicate that only Direct Flight Segments (DCT) that exceed this value are concerned by a Flight Restriction. | ValDistanceType |
| RouteTrajectorySegment | estimatedElapsedTime | The estimated time required to proceed from one significant point to another. | TM_Duration |
| RouteTrajectorySegment | duration | Duration of the Trajectory Segment, derived from the eventTime and the eventEndTime. | TM_Duration |
| RouteTrajectorySegment | cruisingLevel | The planned cruising level for the first or the whole portion of the route to be flown. | Integer |
| RouteTrajectorySegment | auxiliaryPowerUnitFuelBurn | The amount of fuel burn of the auxiliary power unit usage during flight segment. | Decimal |
| RouteTrajectorySegment | assignedSpeed | The True Airspeed for the first or the whole cruising portion of the flight. | ValSpeedType |
| RouteTrajectorySegment | - | A portion of the flight route or trajectory. | - |
| RouteTrajectoryPoint | upstream | The upstream ATC volume related to the trajectory point. | Airspace |
| RouteTrajectoryPoint | belongsTo | The ATC volumes to which the point belongs to. | Airspace |
| RouteTrajectoryPoint | downstream | The downstream ATC volume related to the trajectory point. | Airspace |
| RouteTrajectoryPoint | correspondingInfrastructurePoint | The infrastructure point matched by the trajectory point. | InfrastructurePoint |
| RouteTrajectoryPoint | sourceSTAR | The standard instrument arrival of which one of the constituting significant point is matched by the trajectory point. | StandardInstrumentArrival |
| RouteTrajectoryPoint | sourceSID | The standard instrument departure of which one of the constituting significant point is matched by the trajectory point. | StandardInstrumentDeparture |
| RouteTrajectoryPoint | arrival | The arrival operations which make use of the trajectory point. | ArrivalOperations |
| RouteTrajectoryPoint | aircraftState | The state of the aircraft at the trajectory point. | AircraftState |
| RouteTrajectoryPoint | airspaceEntry | Airspace entry that occurs at the trajectory point. | AirspaceEntry |
| RouteTrajectoryPoint | overPoint | Over point event occuring at the trajectory point. | OverPoint |
| RouteTrajectoryPoint | referedOpenConstraint | The reference to the open constraint closed through this trajectory point. | ATMTrajectoryConstraint |
| RouteTrajectoryPoint | lateralConstraint | Type and bound of a lateral constraint. | LateralConstraint |
| RouteTrajectoryPoint | speedConstraint | Type and bound of a speed constraint. | SpeedConstraint |
| RouteTrajectoryPoint | altitudeConstraint | Type and bound of a vertical constraint. | VerticalConstraint |
| RouteTrajectoryPoint | timeConstraint | Type and bound of a time constraint. | TimeConstraint |
| RouteTrajectoryPoint | stakeholder | The stakeholder inserting the trajectory point. | Unit |
| RouteTrajectoryPoint | weatherCondition | The weather condition at the trajectory point. | WeatherCondition |
| RouteTrajectoryPoint | inboundSegment | The trajectory segment followed to reach the trajectory point. | RouteTrajectorySegment |
| RouteTrajectoryPoint | usage | Characterizes a point of the trajectory | CodeRouteTrajectoryPointUsageType |
| RouteTrajectoryPoint | estimatedElapsedTimeFromReference | Time elapsed since a point of reference. | TM_Duration |
| RouteTrajectoryPoint | distanceFromTakeOff | Cumulative track distance from take-off to that trajectory point. | ValDistanceType |
| RouteTrajectoryPoint | cumulativeDistance | Distance flown from a point of reference. | ValDistanceType |
| RouteTrajectoryPoint | accumulatedEstimatedElapsedTime | The estimated time required from take-off to that trajectory point. | TM_Duration |
| RouteTrajectoryPoint | acceptanceStatus | The status of acceptance of the trajectory point by the FDMP. | CodeTrajectoryPointAcceptanceStatusType |
| RouteTrajectoryPoint | - | A significant point used in defining the flight path of an aircraft. | - |
| RouteTrajectory | route | Route on which the trajectory is based. | Route |
| RouteTrajectory | flight | The flight whose movement is described by the trajectory. | Flight |
| RouteTrajectory | trajectoryConstraint | A trajectory constraint that restricts the planning and execution of the trajectory. | ATMTrajectoryConstraint |
| RouteTrajectory | trajectorySegment | A trajectory segment being part of the trajectory. | RouteTrajectorySegment |
| RouteTrajectory | trajectoryPoint | A trajectory point used for describing the trajectory. | RouteTrajectoryPoint |
| RouteTrajectory | type | The type of trajectory. | CodeRouteTrajectoryType |
| RouteTrajectory | requestReference | The reference of the clearance request for a 4D trajectory across an ATSU AoR. | CharacterString |
| RouteTrajectory | rejectReason | The reason under which the Trajectory request is rejected. | CharacterString |
| RouteTrajectory | flightRules | The category of flight rules with which the pilot intends to comply. | CodeFiledFlightRulesType |
| RouteTrajectory | dialogueStatus | Status information for monitoring the progression of the dialogue. | CodeTrajectoryDialogueStatusType |
| RouteTrajectory | - | The description of movement of an aircraft. | - |
| RouteSegment | airway | A control area or portion thereof established in the form of a corridor. | Airspace |
| RouteSegment | startEnRouteSegmentPoint | The start en-route segment point for the route segment. | InfrastructurePoint |
| RouteSegment | endEnRouteSegmentPoint | The end en-route segment point for the route segment. | InfrastructurePoint |
| RouteSegment | routeFormed | The route formed partly by the route segment. | Route |
| RouteSegment | availability | The operational availability of the route segment. | RouteAvailability |
| RouteSegment | evaluationArea | The obstacle evaluation area for the route segment. | ObstacleAssessmentArea |
| RouteSegment | widthRight | The distance from the centreline of the route segment to the right edge, when considering the direction from the start point to the end point. | ValDistanceType |
| RouteSegment | widthLeft | The distance from the centreline of the route segment to the left edge, when considering the direction from the start point to the end point. | ValDistanceType |
| RouteSegment | upperLimit | The vertical position of the route segment ceiling. | ValVerticalDistanceType |
| RouteSegment | turnDirection | The turn direction, if any, at the end of the segment in order to continue on to the next segment of the same route. | CodeDirectionTurnType |
| RouteSegment | trueTrack | The initial true track. | Angle |
| RouteSegment | reverseTrueTrack | The reverse initial true track. | Angle |
| RouteSegment | reverseMagneticTrack | The reverse initial magnetic track. | Angle |
| RouteSegment | requiredNavigationPerformance | The required navigation performance for the route portion expressed in NM. | Decimal |
| RouteSegment | pathType | The type of segment path. | CodeRouteSegmentPathType |
| RouteSegment | navigationType | Classification of the route portion for navigational purposes. | CodeRouteNavigationType |
| RouteSegment | minimumObstacleClearanceAltitude | The minimum altitude for a defined segment of flight that provides the required obstacle clearance. | ValVerticalDistanceType |
| RouteSegment | minimumEnrouteAltitude | The altitude for an en-route segment that provides adequate reception of relevant navigation facilities and ATS communications, complies with the airspace structure and provides the required obstacle clearance. | ValVerticalDistanceType |
| RouteSegment | minimumCrossingAtEnd | The lowermost vertical position at the end point, when flying on the route portion in the direction indicated in the route portion usage. | ValVerticalDistanceType |
| RouteSegment | maximumCrossingAtEnd | The uppermost vertical position at the end point, when flying on the route portion in the direction indicated in the route portion usage. | ValVerticalDistanceType |
| RouteSegment | magneticTrack | The initial magnetic track. | Angle |
| RouteSegment | lowerLimit | The vertical position of the route segment floor. | ValVerticalDistanceType |
| RouteSegment | level | A code indicating if the route segment is in the upper airspace, the lower airspace or both. | CodeLevelType |
| RouteSegment | length | The length of the path. | ValDistanceType |
| RouteSegment | hasSignalGap | Indication of a signal gap in the segment. | Boolean |
| RouteSegment | designatorSuffix | A suffix for the route designator defined in accordance with ICAO Annex 11. | CodeRouteDesignatorSuffixType |
| RouteSegment | - | A route or portion of route usually flown without an intermediate stop. | - |
| RoutePortion | changeOverPoint | The change over point that applies to the route portion. | InfrastructurePoint |
| RoutePortion | start | The starting significant point for the route portion. | InfrastructurePoint |
| RoutePortion | intermediatePoint | An intermediate significant point for the route portion. | InfrastructurePoint |
| RoutePortion | end | The ending significant point for the route portion. | InfrastructurePoint |
| RoutePortion | referencedRoute | The route referenced by the route portion. | Route |
| RoutePortion | flightPlanningAndATFMservice | The flight planning and air traffic flow management service provided for the route portion. | AirTrafficManagementService |
| RoutePortion | distance | The distance from the start of the route portion to the position where change over occurs. | ValDistanceType |
| RoutePortion | - | A group of two or more consecutive segments of the same route, which have the usage and/or the same flight restrictions. | - |
| RouteDME | referencedDME | The DME referenced on the route. | DME |
| RouteDME | applicableRoutePortion | The route portion that the routeDME applies to. | RoutePortion |
| RouteDME | isSatisfactory | Indication whether the critical DME passed satisfactory or unsatisfactory. | Boolean |
| RouteDME | isCriticalDME | Indication whether the DME is critical for navigation on the route portion. | Boolean |
| RouteDME | - | DME facilities that are used for a particular route for DME/DME navigation. | - |
| RouteCondition | route | The route which is subject to observation or forecast. | Route |
| RouteCondition | - | Weather observations and / or forecasts related to routes. | - |
| RouteAvailability | hostAirspace | The Flight Information Region where the route opening/closure is located. | Airspace |
| RouteAvailability | level | The airspace layer referenced by the route usage. | AirspaceLayer |
| RouteAvailability | status | The availability status of the route, in the direction indicated by the direction and/or cardinalDirection. | CodeRouteAvailabilityType |
| RouteAvailability | direction | The direction in which the route segment is considered when a specific usage is described. | CodeDirectionType |
| RouteAvailability | conditionalRouteType | The category of the conditional route according to the Flexible Use of Airspace rules. | CodeConditionalRouteType |
| RouteAvailability | cardinalDirection | The direction for which the usage is specified, expressed as compass angle. | CodeCompassPointType |
| RouteAvailability | - | The operational availability of a route. | - |
| Route | airspace | The airspace which protects the route | Airspace |
| Route | userOrganisation | The organisation that normally generates activity on the military training route. | Organisation |
| Route | routeSegment | A route segment which forms a part of the route. | RouteSegment |
| Route | type | The classification of the route. | CodeRouteType |
| Route | name | The name by which the route is known. | CharacterString |
| Route | multipleIdentifier | A suffix for the route designator, indicating alternates for homonymous routes. | CodeUpperAlphaType |
| Route | militaryUse | Indication whether the route is for exclusive use by military aircraft. | CodeMilitaryStatusType |
| Route | militaryTrainingType | The type of military training activity for which the route has been designed. | CodeMilitaryTrainingType |
| Route | locationDesignator | A description of the area in which the designated route is situated. | CharacterString |
| Route | internationalUse | yA code indicating if the route segment is international or domestic. | CodeRouteOriginType |
| Route | flightRule | Indication of the flight rules to be observed by aircraft. | CodeFlightRulesType |
| Route | designatorSecondLetter | The letter of the route designator, which may have special significance with regard to the route usage limitations, depending on the region. | CodeRouteDesignatorLetterType |
| Route | designatorPrefix | A prefix for the route designator, indicating whether the route is upper ATS, reserved for helicopters or reserved for supersonic flights. | CodeRouteDesignatorPrefixType |
| Route | designatorNumber | The number of the route designator. | Integer |
| Route | - | A specified route designed for channeling the flow of traffic as necessary for the provision of air traffic service (ATS) from the end of the take-off and initial climb phase to the commencement of the approach and landing phase. | - |
| Road | associatedAerodrome | The aerodrome the road is associated with. | Aerodrome |
| Road | accessibleStand | Aircraft stand that is accessed via the road. | AircraftStand |
| Road | surfaceProperties | Surface characteristics of the road. | SurfaceCharacteristics |
| Road | type | Type of road at an aerodrome. | CodeRoadType |
| Road | status | An indicator of the operational status of a service road. | CodeStatusOperationsType |
| Road | isAbandoned | An indicator that a road is no longer in operational use, but it is still physically present and visible, although usually in a degraded state. | Boolean |
| Road | designator | The designator or name of the service road. | CharacterString |
| Road | - | An established surface route on the movement area meant for the exclusive use of vehicles. | - |
| Ridge | side | The side of the runway where the ridge of deposited material is located. | CodeRelativePositionType |
| Ridge | distance | Distance of the ridge of deposited material from the edge of the movement area. | ValDistanceType |
| Ridge | depth | Height of the ridges of deposited material. | ValDistanceType |
| Ridge | - | Ridges of deposited material to the left or right of the runway, relative to the runway direction with the lowest designation number. | - |
| Reflector | type | The type of reflector. | CodeReflectorType |
| Reflector | - | A reflector used with a precision approach radar. | - |
| Ranked4DTrajectories | desired4DTrajectory | One of the desired trajectory that is part of the ranked listing of preferred trajectories. | RouteTrajectory |
| Ranked4DTrajectories | - | A series of desired 4D trajectories, with tolerances supplied if necessary by the airspace user to define when the next ranked trajectory should be used. | - |
| RadioNavigationService | servedAerodrome | The aerodrome served by the radio navigation service. | Aerodrome |
| RadioNavigationService | runwayDirection | The runway direction served by the radio navigation service. | RunwayDirection |
| RadioNavigationService | touchDownLiftOff | Particular landing area at which the radio navigation service is installed. | TouchDownLiftOff |
| RadioNavigationService | radioNavaidEquipment | The component of the radio navigation service. | RadioNavigationAid |
| RadioNavigationService | availability | The operational status of the radio navigation service. | NavaidOperationalStatus |
| RadioNavigationService | authority | The authority repsonsible for the service. | Organisation |
| RadioNavigationService | type | The type of the radio navigation service. | CodeNavaidServiceType |
| RadioNavigationService | purpose | Indication of the intended usage of the radio navigation service. | CodeNavaidPurposeType |
| RadioNavigationService | name | The long name given to the composite radio navigation service. | CharacterString |
| RadioNavigationService | isFlightChecked | Indication whether the radio navigation service has been flight checked. | Boolean |
| RadioNavigationService | designator | The coded identifier given to the radio navigation service. | CharacterString |
| RadioNavigationService | - | A service providing guidance information or position data for the efficient and safe operation of aircraft supported by one or more radio navigation aids. | - |
| RadioNavigationAid | supportedAirspace | The airspace through which the Radio Navigation Aid supports navigation. | Airspace |
| RadioNavigationAid | referenceRunwayCentreLinePoint | The RunwayCentrelinePoint from which the relative distance of the NavaidEquipment is computed | InfrastructurePoint |
| RadioNavigationAid | referenceRunwayCentreLinePoint | missing data | InfrastructurePoint |
| RadioNavigationAid | authority | The organisation responsible for the equipment. | Organisation |
| RadioNavigationAid | navaid | The Navaid composed of the NavaidEquipment | RadioNavigationService |
| RadioNavigationAid | monitoring | Radio navigation aid monitoring information. | NavaidEquipmentMonitoring |
| RadioNavigationAid | availability | The operational status of the radio navigation aid. | NavaidOperationalStatus |
| RadioNavigationAid | name | The long name given to the radio navigation aid. | CharacterString |
| RadioNavigationAid | magneticVariationAccuracy | The accuracy of the magnetic variation. | Angle |
| RadioNavigationAid | magneticVariation | The measured angle between Magnetic North and True North at the VOR, at the time the magnetic variation was measured. | Angle |
| RadioNavigationAid | isMobile | Indication whether the radio navigation aid is mobile. | Boolean |
| RadioNavigationAid | isFlightChecked | Indication whether the radio navigation aid has been flight checked. | Boolean |
| RadioNavigationAid | emissionClass | A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference. | CodeRadioEmissionType |
| RadioNavigationAid | designator | The identifying code given to the radio navigation aid. | CharacterString |
| RadioNavigationAid | dateMagneticVariation | The year the magnetic variation was measured. | Date |
| RadioNavigationAid | - | Any electronic system which provides information to be used by the pilot or aircraft navigation systems for position determination or flight path guidance. | - |
| RadioFrequencyArea | sector | A non graphical definition describing a portion of a circle associated with the radio frequency area. | CircleSector |
| RadioFrequencyArea | par | The precision approach radar affected by the signal limitation. | PrecisionApproachRadar |
| RadioFrequencyArea | specialNavigationStation | A land based station of a special navigation system. | SpecialNavigationStation |
| RadioFrequencyArea | ssr | The secondary surveillance radar affected by the signal limitation. | SecondarySurveillanceRadar |
| RadioFrequencyArea | radioNavaidEquipment | The component of a system used for air navigation. | RadioNavigationAid |
| RadioFrequencyArea | frequency | A frequency in the range within which radio waves may be transmitted. | RadioCommunicationChannel |
| RadioFrequencyArea | type | A code indicating the type of radio navigation aid limitation. | CodeRadioFrequencyAreaType |
| RadioFrequencyArea | signalType | The type of signal that is affected by the usage limitation. | CodeRadioSignalType |
| RadioFrequencyArea | angleScallop | The value of the scalloping angle, which may affect the radial reading of a VOR or TACAN in plus or minus. | Angle |
| RadioFrequencyArea | - | A limitation, such as coverage, usability, etc., of a radio navigation aid or service frequency. | - |
| RadioCommunicationOperationalStatus | operationalStatus | The operational capability of the radio communication channel. | CodeStatusServiceType |
| RadioCommunicationOperationalStatus | - | Information about the operational status of the radio communication channel. | - |
| RadioCommunicationChannel | service | The service provided on the radio frequency | Service |
| RadioCommunicationChannel | availability | The operational status of the radio communication channel. | RadioCommunicationOperationalStatus |
| RadioCommunicationChannel | trafficDirection | Indication of the eventual directionality of the communication channel. | CodeCommunicationDirectionType |
| RadioCommunicationChannel | rank | A code indicating the role of the communication channel. | CodeFacilityRankingType |
| RadioCommunicationChannel | mode | The type of communication channel. | CodeCommunicationModeType |
| RadioCommunicationChannel | logon | A specified code used for data link, for instance for logon to an ATS unit. | CharacterString |
| RadioCommunicationChannel | isSelectiveCall | A code indicating whether a frequency treats selective call"." | Boolean |
| RadioCommunicationChannel | isFlightChecked | Indication whether the communication channel has been flight checked. | Boolean |
| RadioCommunicationChannel | frequencyReception | The value of the reception frequency. | ValFrequencyType |
| RadioCommunicationChannel | frequencyTransmission | The value of the transmission frequency. | ValFrequencyType |
| RadioCommunicationChannel | emissionType | A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference. | CodeRadioEmissionType |
| RadioCommunicationChannel | - | A radio frequency band of sufficient width and associated identification data used for one- or two-way communication from or to a transmitter on the ground or in the air. | - |
| RadarSystem | aerodrome | The aerodrome on which the equipment is located. | Aerodrome |
| RadarSystem | servedRunway | Runway served by the radar system. | Runway |
| RadarSystem | radarEquipment | The equipment that make up the component(s) of the radar system. | RadarEquipment |
| RadarSystem | office | The office responsible for the equipment. | Organisation |
| RadarSystem | type | The type of service for the radar system. | CodeRadarServiceType |
| RadarSystem | model | The model of the equipment. | CharacterString |
| RadarSystem | isGeneralTerrainMonitor | Indication whether aircraft clearance above the highest terrain and obstacles in a general area is monitored. | Boolean |
| RadarSystem | broadcastIdentifier | The identifier broadcasted for a secondary radar. | CharacterString |
| RadarSystem | - | One or more radar equipments providing radar services. | - |
| RadarEquipment | radarSystem | RadarSystem composed of the RadarEquipment | RadarSystem |
| RadarEquipment | contact | The contact information of the group or individual associated with the radar equipment. | ContactInformation |
| RadarEquipment | standbyPower | A description of how the component is powered if the primary power fails. | CodeStandbyPowerType |
| RadarEquipment | serialNumber | Serial number of the equipment. | CharacterString |
| RadarEquipment | rangeAccuracy | Accuracy of the applicable range of the equipment to detect aircraft. | ValDistanceType |
| RadarEquipment | range | The applicable range of the equipment to detect aircraft. | ValDistanceType |
| RadarEquipment | name | The name of the equipment. | CharacterString |
| RadarEquipment | magneticVariationAccuracy | Accuracy of the magnetic variation. | Angle |
| RadarEquipment | magneticVariation | The angular difference between True North and Magnetic North measured at a given position and date. | Angle |
| RadarEquipment | isMovingTargetIndicatorAvailable | Indication whether a Moving Target Indicator (MTI) is available for the component. | Boolean |
| RadarEquipment | isForSpecialUseOnly | Indication whether the equipment is for special use procedures only. | Boolean |
| RadarEquipment | isForSpecialAircraftOnly | Indication whether the equipment is to be only used for certain type of aircraft that are capable of using it. | Boolean |
| RadarEquipment | isForMilitaryUseOnly | Indication whether the equipment is for military use only. | Boolean |
| RadarEquipment | isDualChannel | Indication whether the radar equipment has dual frequency. | Boolean |
| RadarEquipment | isDigital | Indication whether the radar equipment is digital. | Boolean |
| RadarEquipment | dateMagneticVariation | The date at which the magnetic variation had this value. | Date |
| RadarEquipment | - | A physical radar equipment. | - |
| RadarComponent | collocationGroup | A number identifying the collocation group to which the radar equipment aid belongs. | Integer |
| RadarComponent | - | The use of a radar equipment as a component of the radar service provided by a radar system. | - |
| Qualification | aircraftEquipment | AircraftEquipment for which the air crew is qualified. | AircraftEquipment |
| Qualification | qualificationType | The type of qualification. | CodeFlightCrewQualificationType |
| Qualification | isQualified | Indication whether the air crew has this qualification. | Boolean |
| Qualification | - | A particular equipment or procedure qualification. | - |
| ProcedureTransition | transitionLeg | One segment of a transition. | SegmentLeg |
| ProcedureTransition | departureRunwayDirection | Runway direction that may be referenced from the departure. | RunwayDirection |
| ProcedureTransition | departureTouchDownLiftOff | Touchdown and lift-off area that may be referenced from the departure. | TouchDownLiftOff |
| ProcedureTransition | vectorHeading | A heading provided for use, when a departure is designed to incorporate radar vectors at the termination point, in the event ATC instructions are not received prior to or at the termination fix. | Angle |
| ProcedureTransition | type | The type of procedure transition. | CodeProcedurePhaseType |
| ProcedureTransition | instruction | Operational instructions that must be observed when flying the procedure transition part. | CharacterString |
| ProcedureTransition | - | A group of consecutive segments that are part of a branch on an approach procedure, SID or STAR. | - |
| ProcedureDME | dme | The distance measuring equipment passing DME/DME evaluation criteria. | DME |
| ProcedureDME | segmentLeg | Segment leg used for evaluating the DME. | SegmentLeg |
| ProcedureDME | isSatisfactory | Indication whether the critical DME passed the DME/DME evaluation criteria. | Boolean |
| ProcedureDME | isCriticalDME | Indication whether the DME is critical for navigation on a procedure segment. | Boolean |
| ProcedureDME | - | DME facilities that are used for a particular segment for DME/DME navigation. | - |
| ProcedureAvailability | status | Indication of the status of the procedure for flight planning/operations. | CodeProcedureAvailabilityType |
| ProcedureAvailability | - | The status of the procedure for flight planning/operations. | - |
| Procedure | aircraftCategoryLimit | Aircraft category limit applicable to the procedure. | AircraftCategory |
| Procedure | aircraftEquipmentLimit | Aircraft equipment limit applicable to the procedure. | AircraftEquipment |
| Procedure | safeAltitude | A series of minimum altitudes in the area where the procedure is executed. | SafeAltitudeArea |
| Procedure | aerodrome | Aerodrome served by the procedure | Aerodrome |
| Procedure | servedTouchDownLiftOff | Thetouch downl lift off served by this procedure. | TouchDownLiftOff |
| Procedure | specialNavigationSystem | The navigation system on which the procedure is based. | SpecialNavigationSystem |
| Procedure | servedRunwayDirection | The runway direction served by this procedure. | RunwayDirection |
| Procedure | radar | The radar system on which a procedure is based. | RadarSystem |
| Procedure | radioNavigationService | The radio navigation service on which the procedure is based. | RadioNavigationService |
| Procedure | flightTransition | A procedure transition belonging to the procedure. | ProcedureTransition |
| Procedure | availability | The operational availability of the procedure. | ProcedureAvailability |
| Procedure | informationService | The service which provides information for the procedure. | InformationService |
| Procedure | name | The name of the instrument procedure. | CharacterString |
| Procedure | isRNAV | Indication whether the procedure is an RNAV procedure. | Boolean |
| Procedure | isFlightChecked | Indication whether the procedure has been flight checked. | Boolean |
| Procedure | instruction | Operational instructions, other than communication failure instructions, which must be respected when flying the procedure. | CharacterString |
| Procedure | codingStandard | The set of rules followed when encoding the procedure legs. | CodeProcedureCodingStandardType |
| Procedure | designCriteria | Rules used in the design of the procedure. | CodeDesignStandardType |
| Procedure | communicationFailureInstruction | Operational instructions which must be observed in case of communication failure. | CharacterString |
| Procedure | - | A series of predetermined manoeuvres with specified protection from obstacles. | - |
| PrimarySurveillanceRadar | type | Defines the type of Primary Surveillance Radar (i.e. ASR or ARSR). | CodePrimaryRadarType |
| PrimarySurveillanceRadar | - | A surveillance radar system which uses reflected radio signals. | - |
| PrecisionApproachRadar | reflector | The reflector used with a PAR. | Reflector |
| PrecisionApproachRadar | slopeAccuracy | The accuracy of the glideslope angle at which the PAR provides landing assistance. | Angle |
| PrecisionApproachRadar | slope | The glideslope angle at which the PAR provides landing assistance. | Angle |
| PrecisionApproachRadar | precisionApproachRadarType | The type of precision approach radar. | CodePARType |
| PrecisionApproachRadar | - | Primary radar equipment used to determine the position of an aircraft during final approach, in terms of lateral and vertical deviations relative to a nominal approach path, and in range relative to touchdown. | - |
| Precipitation | type | Description of the precipitation characteristics using a classification. | CodePrecipitationType |
| Precipitation | amount | Total amount of precipitation measured over a defined period, expressed in mm/hours. | Integer |
| Precipitation | - | Hydrometeor consisting of a fall of an ensemble of particles. The forms of precipitation are: rain, drizzle, snow, snow grains, snow pellets, diamond dust, hail and ice pellets. | - |
| PostalAddress | postalCode | The ZIP or other postal code portion of the physical address for an organisation or individual. | CharacterString |
| PostalAddress | deliveryPoint | The street address portion of the physical address for an organisation or individual. | CharacterString |
| PostalAddress | country | The country name portion of the physical address for an organisation or individual. | CharacterString |
| PostalAddress | city | The city portion of the physical address for an organisation or individual. | CharacterString |
| PostalAddress | administrativeArea | The state or province of an organisation's or individual's physical address. | CharacterString |
| PostalAddress | - | Physical address at which the organization or individual may be contacted. | - |
| PointReference | facilityAngle | missing data | AngleIndication |
| PointReference | facilityDistance | Distance from the facility to the significant point. | DistanceIndication |
| PointReference | significantPoint | A significant point defined by a latitude and longitude and/or a combination of angle and/or distance indications. | SignificantPoint |
| PointReference | role | The role of the defined point reference. | CodeReferenceRoleType |
| PointReference | postFixTolerance | The error distance from the fix to the latest point where the fix may be received along the flight course. | ValDistanceType |
| PointReference | priorFixTolerance | The error distance from the fix to the earliest point where the fix may be received along the flight course. | ValDistanceType |
| PointReference | fixToleranceArea | The area determined by the system use accuracy of the navigation aid(s) on which the fix is based, and the distance from the facility. | TwoDimensionalSurfaceType |
| PointReference | - | The location of a significant point defined using a combination of angles and distances based on the navaid system, radar system or special navigation system. | - |
| PilotInCommand | - | The pilot designated by the operator, or in the case of general aviation, the owner, as being in command and charged with the safe conduct of a flight. | - |
| PilotControlledLighting | activatedGroundLighting | The lighting system on the ground that may be remotely activated by the pilot. | GroundLightSystem |
| PilotControlledLighting | controlledLightIntensity | The characteristics of the lighting system. | LightActivation |
| PilotControlledLighting | type | Type of pilot controlled lighting service. | CodePilotControlledLightingType |
| PilotControlledLighting | standByIntensity | The intensity step/level of the lighting system when not in use. | CodeIntensityStandByType |
| PilotControlledLighting | radioFrequency | The radio frequency to be used by the pilot for the activation of the system. | ValFrequencyType |
| PilotControlledLighting | intensitySteps | The number of intensity steps/levels for a particular type of lighting system. | Integer |
| PilotControlledLighting | duration | The duration the lighting is illuminated. | TM_Duration |
| PilotControlledLighting | activationInstruction | Operational instructions for controlling the lighting systems. | CharacterString |
| PilotControlledLighting | - | An indication that radio control of lighting is available to provide airborne control of lights by keying the aircraft's microphone. | - |
| Pier | width | The overall measured width available for the pier. | ValDistanceType |
| Pier | material | A code used to identify the material(s) used in the construction of the structure. | CodeVerticalStructureMaterialType |
| Pier | length | The overall measured length available for the pier. | ValDistanceType |
| Pier | - | A platform extending from a shore over water and supported by piles or pillars, used to secure, protect, and provide access to ships, boats, and seaplanes. | - |
| PassengerService | type | A code indicating the type of passenger facility/service available. | CodePassengerServiceType |
| PassengerService | - | The availability of passenger amenities and facilities at or in the vicinity of an aerodrome. | - |
| PassengerLoadingBridge | associatedStand | The aircraft stand associated with the passenger loading bridge. | AircraftStand |
| PassengerLoadingBridge | type | Type of bridge used by passengers and crew to board and deplane an aircraft. | CodeLoadingBridgeType |
| PassengerLoadingBridge | name | A name for the passenger boarding bridge. | CharacterString |
| PassengerLoadingBridge | - | A mechanically operated, adjustable ramp to provide direct passenger access between aircraft and buildings. | - |
| OxygenSupply | type | The type of oxygen supplies for aviation usage. | CodeOxygenSupplyType |
| OxygenSupply | - | The type(s) of oxygen supplies available for aviation usage. | - |
| OverPoint | infrastructurePoint | The infrastructure point which is overflown. | InfrastructurePoint |
| OverPoint | routeTrajectoryPoint | The point of the flight route or trajectory which can match the associated infrastructure point, thus triggering the OverPoint event. | RouteTrajectoryPoint |
| OverPoint | time | The time at which the fly over point event occurs. | DateTimeWithPlanningType |
| OverPoint | hasOverflightHappened | Indicates whether the significant point has been actually overflown. | Boolean |
| OverPoint | delay | The delay at the point. | DurationWithPlanningType |
| OverPoint | assignedSpeed | Speed that the flight is requested to respect when flying over the point. | ValSpeedWithBoundaryType |
| OverPoint | assignedFlightLevel | Altitude that the flight is requested to respect when flying over the point. | ValAltitudeWithBoundaryType |
| OverPoint | - | The event of flying over a significant point. | - |
| OrganisationAssociation | type | The kind of association between two organisations. | CodeOrganisationHierarchyType |
| OrganisationAssociation | - | A type of hierarchical or associative relationship between two organisations showing ownership, supervision or membership. | - |
| Organisation | authorityType | The type of authority that the organisation has for an airspace | AuthorityForAirspace |
| Organisation | militaryTrainingRoute | A military training route used by the organisation. | Route |
| Organisation | aerodrome | The aerodrome over which the organisation has authority. | Aerodrome |
| Organisation | radioNavaidEquipment | NavaidEquipment which is under the responsibility of the OrganisationAuthority | RadioNavigationAid |
| Organisation | station | The SpecialNavigationStation which is under the responsibility of the OrganisationAuthority | SpecialNavigationStation |
| Organisation | navigationSystem | SpecialNavigationSystem which is under the responsibility of the OrganisationAuthority | SpecialNavigationSystem |
| Organisation | navigationService | Radio navigation service provided by the organisation. | RadioNavigationService |
| Organisation | managedRadar | RadarSystem which is managed by the OrganisationAuthority | RadarSystem |
| Organisation | dateReference | A special date which applies in the organisation. | SpecialDate |
| Organisation | contact | Contact details for the organisation. | ContactInformation |
| Organisation | supervisingUnit | The Unit in charge of the supervision of the OrganisationAuthority | Unit |
| Organisation | relatedOrganisation | The related organisation, authority or agency. | Organisation |
| Organisation | type | An indicator of the nature of an authority in terms of its status or business role in air traffic management. | CodeOrganisationType |
| Organisation | nationalityMark | A nationality symbol included in the radio call signs allocated to the State of Registry by the International Telecommunication Union. | CharacterString |
| Organisation | name | The full official name of the organisation. | CharacterString |
| Organisation | military | An indicator of the type of operations under the authority of the organisation. | CodeMilitaryOperationsType |
| Organisation | designator | A distinguishing label, term, abbreviation or acronym used to identify an organisation, authority, agency or unit. | CharacterString |
| Organisation | commonMark | A mark assigned by the International Civil Aviation Organization to the common mark registering authority registering aircraft of an international operating agency on other than a national basis. | CharacterString |
| Organisation | - | A collection of people organized together into a community or other social, commercial or political structure. The group has some common purpose or reason for existence which goes beyond the set of people belonging to it, and can act as an agent. | - |
| OperatorConfiguration | colourAndMarking | The colour and markings of the operator. | AircraftColourAndMarking |
| OperatorConfiguration | configurationOwner | The operator which selected the configuration. | AircraftOperator |
| OperatorConfiguration | numberOfSeats | The number of seats installed on the aircraft. | Integer |
| OperatorConfiguration | - | Aircraft configuration established by an aircraft operator for its fleet. | - |
| OnlineContact | protocol | The connection protocol to be used for accessing an contact's online resource. | CharacterString |
| OnlineContact | network | The official name of the telecommunication network on which a contact's online resource is located. | CodeTelecomNetworkType |
| OnlineContact | linkage | A contact's location (address) for on-line access using a Uniform Resource Locator address or similar addressing scheme. | CharacterString |
| OnlineContact | The address of the electronic mailbox of the responsible organisation or individual. | CharacterString | |
| OnlineContact | - | On-line or Network information that can be used to contact the individual or organisation, including eMail address and web site page. | - |
| Oil | category | A code indicating a category of oil used in aircraft. | CodeOilType |
| Oil | - | The type(s) of lubricating oil available for aircraft at an aerodrome. | - |
| OffBlockReady | tobtUpdateCount | The number of updates of TOBT after TSAT has been issued. | Integer |
| OffBlockReady | time | Time at which the aircraft is ready for Off-Block. | DateTimeWithPlanningType |
| OffBlockReady | - | Event at which all doors of an aircraft are closed and departure will be possible immediately after reception of the ATC clearance. | - |
| OffBlock | departure | Operations for which the aircraft departs from its parking position. | DepartureOperations |
| OffBlock | time | Time at which the aircraft departs from its parking position. | DateTimeWithPlanningType |
| OffBlock | - | The departure of the aircraft from its parking position. | - |
| Obstruction | adjustment | Operational factors applied to obstacle clearance altitudes to produce the safest usable altitude. | AltitudeAdjustment |
| Obstruction | obstaclePlacement | Location of obstacle in relation to a given point. | ObstaclePlacement |
| Obstruction | verticalStructureObstruction | Vertical assessment controlling obstacle. | VerticalStructure |
| Obstruction | slopePenetration | A value calculated by dividing 102.0 (a constant) with the angle of the glidepath. | Angle |
| Obstruction | requiredClearance | Required altitude adjustment above any obstacle or terrain within a defined safety buffer region. | ValDistanceType |
| Obstruction | minimumAltitude | The value of the minimum obstacle clearance altitude. | ValVerticalDistanceType |
| Obstruction | isControlling | Indication whether it is a controlling obstruction for the associated obstacle assessment area. | Boolean |
| Obstruction | isCloseIn | Indication whether the obstruction penetrates the 40:1 OCS, therefore requiring a climb gradient to 200 feet or less above the departure end of runway. | Boolean |
| Obstruction | isAssessmentSurfacePenetrated | A code indicating whether the controlling obstacle penetrates the assessment surfaces. | Boolean |
| Obstruction | - | The highest airspace, obstacle or terrain relative to a prescribed plane within a specified area. | - |
| ObstaclePlacement | pointType | The type of point referenced when determining the bearing and distance to the obstruction. | CharacterString |
| ObstaclePlacement | obstaclePlacement | The obstacle position relative to the centreline. | CodeRelativePositionType |
| ObstaclePlacement | obstacleDistance | The distance from a given point to the obstruction. | ValDistanceType |
| ObstaclePlacement | obstacleBearing | The bearing from a given point to the obstruction. | Angle |
| ObstaclePlacement | - | Provides the location relative to a given point. | - |
| ObstacleAssessmentArea | aircraftCategory | Aircraft category for which the obstacle assessment area is evaluated. | AircraftCategory |
| ObstacleAssessmentArea | significantObstacle | The obstacle that controls the altitude definition of the assessment area would penetrate the 40:1 OCS. | Obstruction |
| ObstacleAssessmentArea | type | The type of area being assessed. | CodeObstacleAssessmentSurfaceType |
| ObstacleAssessmentArea | surfaceZone | A description of the zones within obstruction identification surfaces (OIS). | CodeObstructionIdSurfaceZoneType |
| ObstacleAssessmentArea | slopeLowerAltitude | The altitude at the bottom of the assessment area. | ValVerticalDistanceType |
| ObstacleAssessmentArea | slope | The slope value of the extent. | Decimal |
| ObstacleAssessmentArea | sectionNumber | A sequence number indicating a part of an assessment area. | Integer |
| ObstacleAssessmentArea | safetyRegulation | Identifier for the safety regulations in effect within the zone. | CharacterString |
| ObstacleAssessmentArea | gradientLowHigh | Low to high gradient within the airspace. | Decimal |
| ObstacleAssessmentArea | assessedAltitude | Highest of the minimum altitudes in controlling obstacles plus the altitude adjustments (operational factors). | ValVerticalDistanceType |
| ObstacleAssessmentArea | - | The geometry of surfaces used to define the altitude the length of a segment, holding pattern, etc., in function of the obstructions located in the area. | - |
| ObstacleArea | ownerAerodrome | The aerodrome for which the obstacle area has been defined. | Aerodrome |
| ObstacleArea | ownerRunway | The ruwnay for which the obstacle area has been defined. | RunwayDirection |
| ObstacleArea | obstacle | Obstale within the obstacle area. | VerticalStructure |
| ObstacleArea | ownerOrganisation | The organisation for which the obstacle area has been defined. | Organisation |
| ObstacleArea | type | The type of obstacle coverage area. | CodeObstacleAreaType |
| ObstacleArea | obstructionIdentificationSurfaceCondition | An indicator of the type of obstacle assessment surface that obstructing area represents. | CodeObstacleAssessmentSurfaceType |
| ObstacleArea | - | An area used for the purpose of collecting obstacle data, as necessary for air navigation systems or functions. | - |
| Obscuration | type | Type of hydrometeor. | CodeObscurationType |
| Obscuration | - | A weather phenomenon which reduces the visibility due to hydrometeor or lithometeor in suspension in the air. | - |
| ObjectWithSchedule | timesheet | A component of the schedule. | Timesheet |
| ObjectWithSchedule | specialDateAuthority | The organisation responsible for the special dates within the schedule. | CharacterString |
| ObjectWithSchedule | - | An object with a repetitive time period, occurring cyclically. | - |
| Object | annotation | A general text note for the object or for one of its properties. | Note |
| Object | - | A standardized or formalized collection of a Data Entity's Property/(ies). Object does not exist without the Data Entity but can be part of the operational language or system-specific property. | - |
| Note | linguisticNote | The note written linguistically. | LinguisticNote |
| Note | purpose | An indication of the goal which led to the provision of the free text note. | CodeNotePurposeType |
| Note | propertyName | The name of the entity property for which this note is relevant, if applicable. If no propertyName is specified, then the Note is relevant for the entity as a whole. | CharacterString |
| Note | - | A general text note for an entity or for one of its properties. | - |
| NonMovementArea | associatedAerodrome | The aerodrome the non-movement area is associated with. | Aerodrome |
| NonMovementArea | - | Area where aircraft cannot be seen by a control tower and therefore are restricted to move. | - |
| NonAutomatedWeatherObservationSource | nonAutomatedWeatherInformationSourceType | The type of weather information source. | CodeNonAutomatedWeatherInformationSourceType |
| NonAutomatedWeatherObservationSource | - | Weather sources that tend to be manual in nature. | - |
| NonAutomatedWeatherObservationInstrument | weatherInstrumentType | The type of weather instrument used in non-automated weather observation. | CodeWeatherInstrumentType |
| NonAutomatedWeatherObservationInstrument | - | Non-Automated Weather Observation Instrument | - |
| NitrogenSupply | type | The type of nitrogen supplies for aviation usage. | CodeNitrogenSupplyType |
| NitrogenSupply | - | Nitrogen supplies in aviation. | - |
| NDB | frequency | The frequency of the NDB emission. | ValFrequencyType |
| NDB | emissionBand | The emission band for the NDB. | CodeEmissionBandType |
| NDB | class | The class of the NDB. | CodeNDBUsageType |
| NDB | - | A low or medium radio navigation service transmitting signals whereby the pilot of a suitably equipped aircraft can determine bearings, 'home in' on, and/or track to or from the station. | - |
| NavigationAreaSectorDesign | turnDirection | A code indicating the direction of the turn. | CodeDirectionTurnType |
| NavigationAreaSectorDesign | terminationAltitude | The termination altitude. | ValVerticalDistanceType |
| NavigationAreaSectorDesign | isTurnPermitted | Indication whether the sector is clear for the direction of turn. | Boolean |
| NavigationAreaSectorDesign | designGradient | The procedure design gradient. | Decimal |
| NavigationAreaSectorDesign | - | Design criteria used for the navigation area sector. | - |
| NavigationAreaSector | sectorDefinition | A portion of a navigation area. | CircleSector |
| NavigationAreaSector | significantObstacle | The obstacle that controls the altitude definition of the sector or would penetrate the 40:1 obstacle clearance surface. | Obstruction |
| NavigationAreaSector | sectorCriteria | The sector criteria used to define a navigation area sector. | NavigationAreaSectorDesign |
| NavigationAreaSector | - | Subdivision of a sector to allow for different altitudes or gradients. | - |
| NavigationAreaRestriction | sectorDefinition | The assessment area. | CircleSector |
| NavigationAreaRestriction | designSurface | An evaluation area used when designing a procedure to insure safety of aircraft. | ObstacleAssessmentArea |
| NavigationAreaRestriction | procedure | The procedure to which the navigation area restriction applies. | Procedure |
| NavigationAreaRestriction | type | The type of restriction area. | CodeNavigationAreaRestrictionType |
| NavigationAreaRestriction | - | Area that is restricted from use for a procedure. | - |
| NavigationArea | centrePoint | The significant point which the navigation area is based on. | InfrastructurePoint |
| NavigationArea | sector | A subdivision of the navigation area designed to provide safety. | NavigationAreaSector |
| NavigationArea | departure | The SID that is protected by the navigation area. | StandardInstrumentDeparture |
| NavigationArea | navigationAreaType | The type of navigation area that is defined. | CodeNavigationAreaType |
| NavigationArea | minimumVisibility | The minimum visibility needed when using the departure navigation area. | ValDistanceType |
| NavigationArea | minimumCeiling | The minimum cloud base needed when using the departure navigation area. | ValVerticalDistanceType |
| NavigationArea | - | An area specified by sectors with altitude or procedure descent gradient limitations for omnidirectional departures or Pilot navigation area. | - |
| NavaidOperationalStatus | signalType | The type of signal that is affected by the operational status. | CodeRadioSignalType |
| NavaidOperationalStatus | operationalStatus | The operational status of the radio navigation aid. | CodeStatusNavaidType |
| NavaidOperationalStatus | - | Information about the operational status of the radio navigation aid. | - |
| NavaidEquipmentMonitoring | isMonitored | An indicator that the radio navigation aid is monitored. | Boolean |
| NavaidEquipmentMonitoring | - | Information about the radio navigation aid monitoring. | - |
| NavaidEquipmentDistance | distanceAccuracy | The accuracy of the distance between a runway's centreline point and a specified radio navigation aid. | ValDistanceType |
| NavaidEquipmentDistance | distance | The measured or calculated distance between a runway centreline point and a radio navigation aid. | ValDistanceType |
| NavaidEquipmentDistance | - | The distances between various runway centreline points and a radio navigation aid. | - |
| NavaidComponent | markerPosition | A code indicating the position, in a navaid landing system, of the markers situated on the centreline of a runway. | CodePositionInILSType |
| NavaidComponent | isOwnedByService | Indicator that the navaid component is owned by the radio navigation service instead of just being used by the service (as a navaid component can be used by multiple radio navigation services). | Boolean |
| NavaidComponent | isNavigableLocation | Indication that the radio navigation aid is used to specify the navigable location of the radio navigation service when the radio navigation service is used as a significant point. | Boolean |
| NavaidComponent | collocationGroup | A number identifying the collocation group to which the radio navigation aid belongs. | Integer |
| NavaidComponent | - | The use of a radio navigation aid as a component of a radio navigation service. | - |
| MovementDescription | towardsCardinalDirection | The cardinal direction towards which the meteorological phenomenon is moving. | CodeCompassPointType |
| MovementDescription | speed | Speed of the movement of the meteorological phenomenon. | ValSpeedType |
| MovementDescription | isStationary | Indication whether a meteorological phenomenon is moving or not. | Boolean |
| MovementDescription | fromCardinalDirection | The cardinal direction from which the meteorological phenomenon is moving. | CodeCompassPointType |
| MovementDescription | directionTowards | Heading of the movement of a meteorological phenomenon. | Angle |
| MovementDescription | directionFrom | The angle from which the meteorological phenomenon is moving. | Angle |
| MovementDescription | - | Movement information associated with a phenomenon. | - |
| MLSElevation | angleSpan | The value of the span angle of the elevation transmitter signal between the lower and the upper limits. | Angle |
| MLSElevation | angleNominal | The normal glide path angle for the MLS installation. | Angle |
| MLSElevation | angleMinimum | The value of the lowest elevation angle authorized for an MLS procedure. | Angle |
| MLSElevation | angleAccuracy | Accuracy of the elevation angle. | Angle |
| MLSElevation | - | A component of an MLS consisting of an SHF transmitter, and associated equipment radiating signals within a volume of airspace served by the MLS, thereby furnishing elevation information as an angular value to aircraft approaching the runway. | - |
| MLSAzimuth | type | A code indicating if it is 'normal' or 'back' azimuth equipment. | CodeMLSAzimuthType |
| MLSAzimuth | trueBearingAccuracy | Accuracy of the measured angle between the azimuth beam and True North at the azimuth antenna | Angle |
| MLSAzimuth | trueBearing | The measured angle between the azimuth beam and True North at the azimuth antenna. | Angle |
| MLSAzimuth | magneticBearing | The measured angle between the direction of the azimuth beam and Magnetic North at the azimuth antenna. | Angle |
| MLSAzimuth | channel | A code indicating the channel on which the Microwave Landing System is operating. | CodeMLSChannelType |
| MLSAzimuth | angleProportionalRight | The value of the angle within which the azimuth indication is proportional to the deviation from the azimuth zero indication direction, and right of this direction from the azimuth antenna. | Angle |
| MLSAzimuth | angleProportionalLeft | The value of the angle within which the azimuth indication is proportional to the deviation from the azimuth zero indication direction, and left of this direction from the azimuth antenna. | Angle |
| MLSAzimuth | angleCoverRight | The value of the angle from the zero indication direction within which the azimuth indication is usable, and right of this direction from the azimuth antenna. | Angle |
| MLSAzimuth | angleCoverLeft | The value of the angle from the zero indication direction within which the azimuth indication is usable, and left of this direction from the azimuth antenna. | Angle |
| MLSAzimuth | - | A component of an MLS consisting of an SHF transmitter and associated equipment, radiating signals in a volume of airspace served by the MLS, thereby furnishing azimuth indications to aircraft approaching the runway or back azimuth indications to aircraft departing from the runway or performing a missed approach procedure. | - |
| MissedApproachProcedure | altimeter | A source for determining aircraft altitude using pressure measurements. | AltimeterSource |
| MissedApproachProcedure | instruction | Operational instructions that must be observed when flying the Missed Approach. | CharacterString |
| MissedApproachProcedure | alternateClimbInstruction | A second climb-to-altitude provided on a missed approach based off the remote altimeter source. | CharacterString |
| MissedApproachProcedure | alternateClimbAltitude | The altitude for the alternate climb instruction. | ValVerticalDistanceType |
| MissedApproachProcedure | - | The procedure to be followed if the approach cannot be continued. | - |
| MissedApproachLeg | condition | A particular final approach condition that must be met for the assessed missed approach. | ApproachCondition |
| MissedApproachLeg | type | The types of missed approach. | CodeMissedApproachType |
| MissedApproachLeg | requiredNavigationPerformance | The minimum navigation performance accuracy required in an airspace. It is the navigation performance accuracy of all the user and navigation system combinations within an airspace. | Decimal |
| MissedApproachLeg | isThresholdAfterMissedApproachPoint | Indication whether the missed approach point is after the threshold. | Boolean |
| MissedApproachLeg | heightAfterMissedApproachPoint | Elevation of the missed approach surface at the missed approach point. | ValVerticalDistanceType |
| MissedApproachLeg | - | A segment leg designed in accordance with the rules for missed approach segments. | - |
| Minima | adjustmentINOP | The inoperable equipment. | EquipmentUnavailableAdjustment |
| Minima | visibility | The minimum visibility needed to land at the airport when using the specified altitude and/or height. | ValDistanceType |
| Minima | radioHeight | The height reported by a radio altimeter. | ValVerticalDistanceType |
| Minima | militaryVisibility | The visibility value applicable to the military height. | ValDistanceType |
| Minima | militaryHeight | The height value for the minimum used by militaries. | ValVerticalDistanceType |
| Minima | isRVREquipmentMandatory | Indication that RVR equipment is mandatory for this operation. | Boolean |
| Minima | heightCode | An indication of the meaning of the height value, such as obstacle clearance height or decision height. | CodeMinimumHeightType |
| Minima | height | The height value for the minimum | ValVerticalDistanceType |
| Minima | altitudeCode | An indication of the meaning of the altitude value. | CodeMinimumAltitudeType |
| Minima | altitude | The lowest altitude an aircraft flies before making a decision to land or abort and take the missed approach. | ValVerticalDistanceType |
| Minima | - | Vertical and horizontal visual minima for a procedure segment conditions such as aircraft category, navigation equipment usage, procedure type, altimeter, etc. | - |
| MilitaryAuthority | fleetAircraft | An aircraft which forms part of the military authority's fleet. | Aircraft |
| MilitaryAuthority | militaryAuthorityType | The type of military authority. | CodeMilitaryAuthorityType |
| MilitaryAuthority | - | The military authority designated by the State. | - |
| MicrowaveLandingSystem | mlsAzimuth | The MLS Azimuth component of the MLS. | MLSAzimuth |
| MicrowaveLandingSystem | mlsElevation | The MLS Elevation component of the MLS. | MLSElevation |
| MicrowaveLandingSystem | signalPerformance | The signal performance level indicating the precision of the MLS system. | CodeSignalPerformanceType |
| MicrowaveLandingSystem | frequency | The frequency of the MLS system. | ValFrequencyType |
| MicrowaveLandingSystem | - | A precision approach and landing guidance system operating in the microwave spectrum, which provides position information and various ground-to-air data. | - |
| Measure | precision | The precision of the unit. | Number |
| Measure | accuracy | Accuracy (standard deviation) of the measured value. | Number |
| Measure | - | The result from performing the act or process of ascertaining the extent, dimensions, or quantity of some entity. | - |
| MarkingElement | style | The style of the marking element line, such as continuous, dotted, etc. on an aerodrome surface. | CodeMarkingStyleType |
| MarkingElement | colour | The colour of the marking element on an aerodrome surface. | CodeColourType |
| MarkingElement | - | A symbol displayed on an aerodrome surface in order to convey aeronautical information. | - |
| MarkingBuoy | markedSeaplaneLandingArea | The seaplane landing area which is marked by the buoy. | SeaplaneLandingArea |
| MarkingBuoy | element | A component of the marking buoy. | LightElement |
| MarkingBuoy | type | The type of the marking buoy at a seaplane landing area. | CodeBuoyType |
| MarkingBuoy | owner | Code indicating the owner of the navigation buoy | CodeMarkingBouyOwnerType |
| MarkingBuoy | name | Any commonly used name associated with the buoy. | CharacterString |
| MarkingBuoy | lightingType | The type of marking buoy lighting. | CharacterString |
| MarkingBuoy | designator | Official number of the marking buoy at a seaplane landing area. | CharacterString |
| MarkingBuoy | colour | Colour of the marking buoy at a seaplane landing area. | CodeColourType |
| MarkingBuoy | - | A floating object moored to the bottom in a particular place, as an aid to navigation or for other specific purposes. | - |
| Marking | sign | A sign used to indicate the position | AerodromeSign |
| Marking | element | A component of the marking. | MarkingElement |
| Marking | marking | A marking used to indicate the position | Marking |
| Marking | type | The type of the marking. | CodeMarkingType |
| Marking | isMarkingICAOStandard | Indicates the aerodrome protection area surface marking is in accordance with International Civil Aviation Organization (ICAO) standard as described in Annex 14. | Boolean |
| Marking | isUsedInLVO | Usage of the feature instance for Low Visibility Operations | Boolean |
| Marking | condition | The quality of aerodrome protection area surface marking such as good, fair, poor and other. | CodeMarkingConditionType |
| Marking | - | A symbol or group of symbols displayed on the surface of the movement area in order to convey aeronautical information. | - |
| MarkerBeacon | frequency | The value of the radio emission frequency. | ValFrequencyType |
| MarkerBeacon | class | A code indicating the class of the radio marker. | CodeMarkerBeaconSignalType |
| MarkerBeacon | axisBearing | The true bearing of the minor axis of the marker beacon. | Angle |
| MarkerBeacon | auralMorseCode | The Morse code transmitted by the beacon. | CharacterString |
| MarkerBeacon | - | A radio navigation service identifying a particular location in space by means of a 75 megahertz (MHz) transmitter which transmits a directional signal to be received by aircraft flying overhead. | - |
| MarineRailway | platformWidth | The measured width of the marine railway platform. | ValDistanceType |
| MarineRailway | platformLength | The measured length of the marine railway platform. | ValDistanceType |
| MarineRailway | platformCapacity | The capacity of the marine railway platform. | ValWeightType |
| MarineRailway | - | A seaplane hauling system using a rolling carriage running from the water to a repair facility ashore. The vessel to be hauled is floated to a position over the carriage and secured with chocks, then the carriage is hauled up the tracks using a cable winch. | - |
| ManualSurfaceWeatherObservation | observedBy | The weather observer who performed the observation. | WeatherObserver |
| ManualSurfaceWeatherObservation | - | Manual Surface Weather Observation | - |
| ManoeuvringAreaUsage | operation | The type of activity for which an area under air traffic control is specified. | CodeOperationManoeuvringAreaType |
| ManoeuvringAreaUsage | - | A rule governing the usage of the manoeuvring area element. | - |
| ManoeuvringAreaAvailability | usage | Rule which regulates the usage of the manoeuvring area. | ManoeuvringAreaUsage |
| ManoeuvringAreaAvailability | warning | A reason for caution when operating at the facility. | CodeAirportWarningType |
| ManoeuvringAreaAvailability | operationalStatus | An indicator of the availability of the facility for specific flight operations. | CodeStatusAirportType |
| ManoeuvringAreaAvailability | - | Information about the operational status of the manoeuvring area elements. | - |
| LongitudinalSeparationMinima | - | The minimum spacing between the estimated positions of the aircraft being separated. The spacing may be based on time or distance. | - |
| Localizer | widthCourseAccuracy | Accuracy of the localizer course width, in degrees. | Angle |
| Localizer | widthCourse | The localizer course width, in degrees. | Angle |
| Localizer | trueBearingAccuracy | Accuracy of the measured angle between the localizer beam and True North at the localizer antenna. | Angle |
| Localizer | trueBearing | The measured angle between the localizer beam and True North at the localizer antenna. | Angle |
| Localizer | magneticBearingAccuracy | Accuracy of the measured angle between the localizer beam and Magnetic North at the localizer antenna. | Angle |
| Localizer | magneticBearing | The measured angle between the localizer beam and Magnetic North at the localizer antenna. | Angle |
| Localizer | frequency | The frequency of the localizer. | ValFrequencyType |
| Localizer | declination | The angular difference between True North and the station declination (Magnetic North - as indicated by the station). | Angle |
| Localizer | backCourseUsable | A code indicating the usability of the localizer signal in the back course sector. | CodeILSBackCourseType |
| Localizer | - | A component of an ILS consisting of a VHF transmitter, radiating signals in the direction served by the ILS, to provide a straight line descent path in the vertical plane containing the centre line of the runway. | - |
| LinguisticNote | language | The language in which the note is written. | LanguageCode |
| LinguisticNote | note | The text of the note, in a specific language. | CharacterString |
| LinguisticNote | - | The note content expressed in a specific language. | - |
| LightStatus | status | The operational status of the light element. | CodeStatusOperationsType |
| LightStatus | - | The operational status of the light(s). | - |
| LightElement | lightElementAvailability | The operational status of the light element. | LightStatus |
| LightElement | type | The type of light source. | CodeLightSourceType |
| LightElement | position | The position of the light element. | ThreeDimensionalPointType |
| LightElement | lightMountingType | A code used to identify the relationship of a lighting fixture with respect to it's mounting surface. | CharacterString |
| LightElement | lightBulbType | The source type of the light. | CodeLightBulbType |
| LightElement | intensity | The intensity of the lights in a light element group. | ValLightIntensityType |
| LightElement | intensityLevel | The relative intensity of the lights in a light element group. | CodeLightIntensityType |
| LightElement | fixtureType | The type of lighting fixture. | CodeLightFixtureType |
| LightElement | colour | An indication of the colour of the lights in a light element group. | CodeColourType |
| LightElement | - | An elementary light source, part of a lighting system. | - |
| LightActivation | intensityLevel | The intensity step of the airborne controlled lighting system activated by the pilot, depending on the number of clicks. | CodeLightIntensityType |
| LightActivation | clicks | The number of clicks on the microphone required for activation of airborne controlled lights at a particular intensity step. | Integer |
| LightActivation | activation | The status of an airborne controlled lighting system when activated as the result of the number of clicks. | CodeLightSystemActivationType |
| LightActivation | - | The status and the intensity of an airborne controlled lighting system when activated by the pilot. | - |
| LateralConstraint | - | A restriction brought to the lateral component of the trajectory of an aircraft. | - |
| LargeLakeCondition | lake | The lake which is subject to observation or forecast. | Lake |
| LargeLakeCondition | - | Weather observations or forecasts over a large body of water with sufficient fetch to generate appreciable wave height. | - |
| Landing | arrival | Operations during which the landing takes place. | ArrivalOperations |
| Landing | preferredLandingRunwayDirection | For Air Ground cooperative air traffic services and especially for Pilot Preferences Downlink services, this data is part of the Aircrew's preferences on the way the flight is to be conducted for various operational reasons. In order to elaborate pertinent control strategies, Controllers need to be aware of these preferences. | RunwayDirection |
| Landing | time | Time at which an aircraft touches down. | DateTimeWithPlanningType |
| Landing | landingTolerance | The tolerance with which the Target Landing time is required to be achieved by the Aircraft. | DateTime |
| Landing | - | Event in which an aircraft touches down. | - |
| LandAndHoldShortOperationsMarking | lahsoType | The type of location being protected by the feature instance | CodeLAHSOMarkingType |
| LandAndHoldShortOperationsMarking | holdingSide | Relative location of the holding side of a holding position, from startpoint to endpoint of line | CodeHoldingSideType |
| LandAndHoldShortOperationsMarking | - | Marking used for Land and Hold Short Operations (LAHSO). | - |
| Lake | - | Inland body of surface water of significant extent. | - |
| JetStream | type | The type of jet stream. | CodeJetStreamType |
| JetStream | - | Flat tubular, quasi-horizontal, current of air generally near the tropopause, whose axis is along a line of maximum speed and which is characterized by great speeds and strong vertical and horizontal wind shears. | - |
| IonosphericStorm | electronContent | The number of electrons along a ray path between a transmitter and a receiver. This number is significant in determining ionospheric effects such as refraction, dispersion, and group delay on radio waves, and can be used to estimate critical frequencies. The total electron content (TEC) is strongly affected by solar and geomagnetic activity. | ValParticleContentType |
| IonosphericStorm | - | Turbulence in the F region of the ionosphere, usually due to a sudden burst of radiation from the Sun. | - |
| IntermediateLeg | requiredNavigationPerformance | The minimum navigation performance accuracy required in an airspace. It is the navigation performance accuracy of all the user and navigation system combinations within an airspace. | Decimal |
| IntermediateLeg | - | A segment leg designed in accordance with the rules for intermediate segments. | - |
| InstrumentLandingSystem | ilsGlidepath | The ILS Glidepath component of the ILS. | ILSGlidepath |
| InstrumentLandingSystem | localizer | The localizer component of the ILS. | Localizer |
| InstrumentLandingSystem | marker | The Marker Beacon component of the ILS. | MarkerBeacon |
| InstrumentLandingSystem | signalPerformance | The signal performance level indicating the precision of the ILS system. | CodeSignalPerformanceType |
| InstrumentLandingSystem | integrityLevel | The quality which relates to the trust which can be placed in the correctness of the information supplied by the ILS facility. | CodeIntegrityLevelILSType |
| InstrumentLandingSystem | frequency | The frequency of the ILS system. | ValFrequencyType |
| InstrumentLandingSystem | courseQuality | An indication of the signal quality of the ILS course structure based on the location the precision signal is usable to. | CodeCourseQualityILSType |
| InstrumentLandingSystem | - | A combination of radio navigation services intended to facilitate aircraft in landing by providing lateral and vertical guidance including indications of distance from the optimum point of landing. | - |
| InstrumentApproachProcedure | circlingArea | The circling area used on an instrument approach procedure to safely provide visual guidance to other runways. | CirclingArea |
| InstrumentApproachProcedure | approachLeg | The approach leg which is part of the instrument approach procedure. | ApproachLeg |
| InstrumentApproachProcedure | finalProfile | The profile view of a final segment defined for an approach procedure. | FinalProfile |
| InstrumentApproachProcedure | taa | The TAA which supplies shift from the enroute environment to the approach procedure. | TerminalArrivalAltitude |
| InstrumentApproachProcedure | missedApproachProcedure | Missed approach procedure to be used when the instrument approach procedure is aborted. | MissedApproachProcedure |
| InstrumentApproachProcedure | multipleIdentification | One character code for multiple approaches of the same approach type. | CodeUpperAlphaType |
| InstrumentApproachProcedure | isSBASReliable | Indication about SBAS reliability and expected level of service. | Boolean |
| InstrumentApproachProcedure | courseReversalInstruction | Operational instruction that must be observed for procedure turns and tear drops. | CharacterString |
| InstrumentApproachProcedure | copterTrack | The final approach track value for copter procedures. | Angle |
| InstrumentApproachProcedure | circlingIdentification | A suffix letter for circling only procedures. | CodeUpperAlphaType |
| InstrumentApproachProcedure | channelGNSS | Operating channel of electronic transceiving equipment. | Decimal |
| InstrumentApproachProcedure | approachType | The type of instrument approach procedure. | CodeApproachType |
| InstrumentApproachProcedure | approachPrefix | Prefix used in support of current naming conventions. | CodeApproachPrefixType |
| InstrumentApproachProcedure | additionalEquipment | Additional equipment needed to fly the procedure. | CodeApproachEquipmentAdditionalType |
| InstrumentApproachProcedure | - | A series of predetermined manoeuvres by reference to flight instruments with specified protection from obstacles from the initial approach fix, or where applicable, from the beginning of a defined arrival route to a point from which a landing can be completed and thereafter, if a landing is not completed, to a position at which holding or en-route obstacle clearance criteria apply. | - |
| InitialLeg | requiredNavigationPerformance | The minimum navigation performance accuracy required in an airspace. It is the navigation performance accuracy of all the user and navigation system combinations within an airspace. | Decimal |
| InitialLeg | - | A segment leg designed in accordance with the rules for initial segments. | - |
| InfrastructurePoint | containingAirspace | The airspace containing the significant point. | Airspace |
| InfrastructurePoint | airspaceLayerForCheck | The block in which the checking of a navigation system or initialisation of an inertial navigation system should be performed. | AirspaceLayer |
| InfrastructurePoint | radioNavaidEquipment | A radio navigation aid that is located near the runway and for which the relative position from a centreline point is defined. | RadioNavigationAid |
| InfrastructurePoint | extendedServiceVolume | For a significant point used as segment point, an approved and flight checked extension to the standard service volume of a navaid. | RadioFrequencyArea |
| InfrastructurePoint | runwayElement | The runway element marked by the significant point. | RunwayElement |
| InfrastructurePoint | applicableRoutePortion | The route portion that the change over point applies to. | RoutePortion |
| InfrastructurePoint | radioNavaidEquipment | missing data | RadioNavigationAid |
| InfrastructurePoint | navaidSystem | A radio navigation service used as significant point. | RadioNavigationService |
| InfrastructurePoint | checkPointFacility | The navigation aid on which the check point is based. | VOR |
| InfrastructurePoint | runwayBlastPad | The runway blast pad marked by the significant point. | RunwayBlastPad |
| InfrastructurePoint | runwayProtectArea | The runway protect area marked by the significant point. | RunwayProtectArea |
| InfrastructurePoint | runwayMarking | The runway marking at the point. | RunwayMarking |
| InfrastructurePoint | aerodrome | Aerodrome with which the infrastructure point is associated. | Aerodrome |
| InfrastructurePoint | arrestingGear | The arresting gear protecting the point. | ArrestingGear |
| InfrastructurePoint | touchDownLiftOff | The touch down lift-off area whose centre is marked by the significant point. | TouchDownLiftOff |
| InfrastructurePoint | connectingGuidanceLine | A GuidanceLine which connects to the RunwayCentrelinePoint | GuidanceLine |
| InfrastructurePoint | associatedDeclaredDistance | The declared distance marked by the runway centreline point. | RunwayDeclaredDistance |
| InfrastructurePoint | onRunway | Location of the runway centreline point. | RunwayDirection |
| InfrastructurePoint | passedBy | The flight which passed by the point. | Flight |
| InfrastructurePoint | facilityMakeup | Specific facility make up used by aircraft to locate the significant point used as segment point. | PointReference |
| InfrastructurePoint | turnRadius | The recommended turn radius when continuing on the previous segment of the route (start point) or when continuing on the next segment of the route (end point). | ValDistanceType |
| InfrastructurePoint | reportingATC | An indicator of the type of position report required by an ATC Unit. | CodeATCReportingType |
| InfrastructurePoint | relativeLocation | A code indicating the location of a significant point in relation to airspace. | CodeAirspacePointPositionType |
| InfrastructurePoint | leadRadial | The lead radial provides information for aircraft with single receiving equipment to change the receiver to the localizer or other facility providing the course guidance and to ensure the aircraft is within the clearance coverage area of LOC facilities before changing frequency or accepting on-course indication. | Angle |
| InfrastructurePoint | leadDME | The lead DME , like the lead Radial, provides information for aircraft with single receiving equipment to change the receiver to the localizer or other facility providing the course guidance and to ensure the aircraft is within the clearance coverage area of LOC facilities before changing frequency or accepting on-course indication. | ValDistanceType |
| InfrastructurePoint | isRadarGuidancePossible | An indicator whether radar guidance is possible for reaching this point. | Boolean |
| InfrastructurePoint | usage | The usage of a point when describing the Airspace or Base Infrastructure. | CodeInfrastructurePointUsageType |
| InfrastructurePoint | checkpointDistance | The value of the distance from the checkpoint to the navaid. | ValDistanceType |
| InfrastructurePoint | checkpointCategory | Indicates the position of the checkpoint; airborne or ground | CodeCheckpointCategoryType |
| InfrastructurePoint | checkpointAngle | The indication of a bearing (at a given point) by the measurement of the angle between the checkpoint and the navaid equipment (VOR). | Angle |
| InfrastructurePoint | - | A point used in describing the base or airspace infrastructure. | - |
| InformationService | clientAirspace | The airspace about which the information is provided. | Airspace |
| InformationService | clientAerialRefuelling | The aerial refuelling for which the information service is provided. | AerialRefuelling |
| InformationService | clientHolding | The holding procedure for which the information is provided. | HoldingProcedure |
| InformationService | clientProcedure | The procedure for which the information is provided. | Procedure |
| InformationService | clientRoute | The route portion for which the information is provided. | RoutePortion |
| InformationService | clientAerodrome | The aerodrome for which the information service is provided. | Aerodrome |
| InformationService | directionFinder | The DirectionFinder associated with the InformationService | DirectionFinder |
| InformationService | navaidBroadcast | The VOR on which the information service is broadcast. | VOR |
| InformationService | type | The type of information service provided. | CodeServiceInformationType |
| InformationService | isVoice | Indication whether the service is provided as voice message. | Boolean |
| InformationService | isRecorded | Indication whether the information broadcast is recorded and played back rather than a live transmission. | Boolean |
| InformationService | isDataLink | Indication whether the service is available via data-link. | Boolean |
| InformationService | - | A service that consists in the provision of aeronautical, meteorological, traffic and related information to aircraft crew and other actors involved in flight operations, in flight or on the ground. | - |
| InBlock | arrival | Operations during which the aircraft arrives at its parking position. | ArrivalOperations |
| InBlock | time | The time that an aircraft arrives in-blocks. | DateTimeWithPlanningType |
| InBlock | - | The arrival of the aircraft at its parking position. | - |
| ILSGlidepath | slope | The angle of the glide path. | Angle |
| ILSGlidepath | referenceDatumHeightAccuracy | Accuracy of the value of the ILS reference datum height. | ValVerticalDistanceType |
| ILSGlidepath | referenceDatumHeight | The value of the ILS reference datum height. | ValVerticalDistanceType |
| ILSGlidepath | frequency | The frequency value of the glide path indicator. | ValFrequencyType |
| ILSGlidepath | angleAccuracy | Accuracy of the glide path angle. | Angle |
| ILSGlidepath | - | A component of an ILS consisting of a UHF transmitter radiating signals and providing a straight line descent path in the vertical plane containing the centre line of the runway served by the ILS, and thereby furnishing descent information down to the lowest authorized decision height or to the surface of a runway, depending on the Facility Performance Category of the ILS. | - |
| IdentifierType | schemeVersionIdentifier | The identification of the version of the identifier scheme. | CharacterString |
| IdentifierType | schemeIdentifier | The identification of the identifier scheme. | CharacterString |
| IdentifierType | schemeAgencyIdentifier | The identification of the agency that manages the identifier scheme. | CharacterString |
| IdentifierType | - | An identifier used to identify one instance of an entity within an identification scheme that is managed by a formal organisation. | - |
| Icing | accretionRate | Ratio of growth of the ice deposit. | Decimal |
| Icing | - | Formation of ice, rime, or hoarfrost on an aircraft in flight. | - |
| HorizontalVisibility | prevailingVisibility | The greatest visibility value, observed in accordance with the definition of visibility", which is reached within at least half the horizon circle or within at least half of the surface of the aerodrome. These areas could comprise contiguous or non-contiguous sectors." | ValDistanceType |
| HorizontalVisibility | minimumVisibility | Visibility for aeronautical purposes is the greater of: a) the greatest distance at which a black object of suitable dimensions, situated near the ground, can be seen and recognized when observed against a bright background; b) the greatest distance at which lights in the vicinity of 1 000 candelas can be seen and identified against an unlit background. | ValDistanceType |
| HorizontalVisibility | isUnidirectionalVisibility | Indication whether the horizontalVisibility is given for a single direction or not. | Boolean |
| HorizontalVisibility | isPrevailingVisibilityAbove10000metres | Indication that the prevailing visibility is of at least 10000 meters. | Boolean |
| HorizontalVisibility | minimumVisibilityDirection | The direction of the minimum visibility relative to the reporting station. | CodeCompassPointType |
| HorizontalVisibility | - | An aggregation of horizontal visibility conditions typically reported together at an aerodrome, including the prevailing visibility and minimum visibility. | - |
| HoldingUse | instruction | Operational instruction concerning the use of the holding procedure in relation with a procedure. | CharacterString |
| HoldingUse | instructedAltitude | An altitude referenced in the holding use instructions. | ValVerticalDistanceType |
| HoldingUse | holdingUse | Indication of how the holding is used on the approach segment. | CodeHoldingUseType |
| HoldingUse | - | The usage of the holding procedure on a segment. | - |
| HoldingProcedure | outboundLegEndPoint | The second waypoint of a two point holding, used to define the end of the outbound leg. | InfrastructurePoint |
| HoldingProcedure | holdingFix | A geographical location that serves as a reference for a holding procedure. | InfrastructurePoint |
| HoldingProcedure | upperLimit | The maximum vertical distance, measured from a specified reference, allowed for all aircraft categories, at all defined speeds, operating in a holding procedure. | ValVerticalDistanceType |
| HoldingProcedure | type | An indicator of the type of holding procedure. | CodeHoldingUsageType |
| HoldingProcedure | turnDirection | An indicator of the turn direction in an aerial manoeuvre performed by aircraft during holding operations. | CodeDirectionTurnType |
| HoldingProcedure | speedLimit | Restricted speed for containment in a smaller pattern during holding operations. | ValSpeedType |
| HoldingProcedure | outboundLegEndTime | The duration of the holding pattern outbound leg. | TM_Duration |
| HoldingProcedure | outboundLegEndDistance | The length of the holding pattern outbound leg. | ValDistanceType |
| HoldingProcedure | outboundCourseType | The type of outbound course to be observed. | CodeCourseType |
| HoldingProcedure | outboundCourse | The outbound course (for example, true track, magnetic track, heading, VOR radial, true bearing, magnetic bearing) from the significant point on which holding is based. | Angle |
| HoldingProcedure | lowerLimit | The minimum vertical distance, measured from a specified reference, allowed for all aircraft categories, at all defined speeds, operating in a holding procedure. | ValVerticalDistanceType |
| HoldingProcedure | isNonStandardHolding | An indication that the holding pattern is non-standard. | Boolean |
| HoldingProcedure | instruction | Operational instructions that must be observed when flying the holding procedure. | CharacterString |
| HoldingProcedure | inboundCourse | The radial, course or bearing of the inbound leg as it pertains to a holding procedure. | Angle |
| HoldingProcedure | - | A predetermined manoeuvre which keeps an aircraft within a specified airspace while awaiting further clearance. | - |
| HoldingAssessment | holdingFix | Point used to evaluate safe holding. | InfrastructurePoint |
| HoldingAssessment | assessedHoldingProcedure | The holding procedure assessed by the holding assessment. | HoldingProcedure |
| HoldingAssessment | unplannedHolding | Holding approved for all significant radials of a navaid or fix. | UnplannedHolding |
| HoldingAssessment | obstacleAssessment | Obstacle assessment area used in the holding assessment. | ObstacleAssessmentArea |
| HoldingAssessment | upperLimit | Max altitude allowed for all aircraft categories at all defined speeds. | ValVerticalDistanceType |
| HoldingAssessment | speedLimit | Restricted speed for containment in a smaller pattern. | ValSpeedType |
| HoldingAssessment | patternTemplate | Number of the holding template. | CharacterString |
| HoldingAssessment | lowerLimit | Minimum altitude allowed for all aircraft categories at all defined speeds. | ValVerticalDistanceType |
| HoldingAssessment | legLengthToward | Leg length for when holding is toward the navaid. | ValDistanceType |
| HoldingAssessment | legLengthAway | Leg length for when holding is away the navaid. | ValDistanceType |
| HoldingAssessment | isForTurbulentAir | Indication that the evaluation is for turbulent air. | Boolean |
| HoldingAssessment | - | The geometry of surfaces that define altitude levels and the structure of an area used to evaluate obstacles for determining holding patterns. | - |
| Hoist | hoistingCapability | Lifting capability of the hoist. | ValWeightType |
| Hoist | - | A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium. The load is attached to the hoist by means of a lifting hook. | - |
| GuidanceLineMarking | markedGuidanceLine | Guidance line that is marked. | GuidanceLine |
| GuidanceLineMarking | guidanceLineMarkingType | The type of guidance line marking. | CodeGuidanceLineMarkingType |
| GuidanceLineMarking | - | A symbol or group of symbols displayed as the guidance line. | - |
| GuidanceLineLightSystem | lightedGuidanceLine | The guidance line lit by the guidance line light system. | GuidanceLine |
| GuidanceLineLightSystem | - | The lighting system for the centreline guidance line. | - |
| GuidanceLine | connectedRunwayCentrelinePoint | Runway centreline point connected via the guidance line. | InfrastructurePoint |
| GuidanceLine | connectedStand | Aircraft stand connected by the guidance line. | AircraftStand |
| GuidanceLine | connectedApron | Apron connected by the guidance line. | Apron |
| GuidanceLine | apronElement | An apron element containing the guidance line. | ApronElement |
| GuidanceLine | deicingArea | A deicing area associated with the guidance line. | DeicingArea |
| GuidanceLine | connectedTouchDownLiftOff | The touch down lift off zone connected by the guidance line. | TouchDownLiftOff |
| GuidanceLine | connectedTaxiway | Taxiway connected by the guidance line. | Taxiway |
| GuidanceLine | guidanceLine | A guidance line related to the current guidance line. | GuidanceLine |
| GuidanceLine | runwayElement | A runway element associated with the guidance line. | RunwayElement |
| GuidanceLine | taxiwayElement | A taxiway element associated with the guidance line. | TaxiwayElement |
| GuidanceLine | taxiHoldingPosition | A TaxiHoldingPosition situated on the GuidanceLine | TaxiwayHoldingPosition |
| GuidanceLine | guidanceLineMarking | The Marking marked on the GuidanceLine | GuidanceLineMarking |
| GuidanceLine | guidanceLineLightSystem | The LightSystem provided for an GuidanceLine | GuidanceLineLightSystem |
| GuidanceLine | usageDirection | The direction in which the guidance line can be used with reference to its geometry. | CodeDirectionType |
| GuidanceLine | type | The type of guidance line on a taxiway. | CodeGuidanceLineType |
| GuidanceLine | maxSpeed | The maximum ground speed permitted on a taxiway. | ValSpeedType |
| GuidanceLine | designator | The identifier of a guidance line on a taxiway. | CharacterString |
| GuidanceLine | - | A line used to guide aircraft on and between airport movement areas. | - |
| GroundTrafficControlService | clientAerodrome | The aerodrome where the surface traffic control service is provided. | Aerodrome |
| GroundTrafficControlService | - | An ATC service provided for the purpose of: (a) preventing collisions on the manoeuvring area between aircraft and between aircraft and obstacles or vehicles; and (b) expediting and maintaining an orderly flow of aircraft operating on the manoeuvring area. | - |
| GroundLightSystem | aerodrome | The aerodrome at which the ground light system is located. | Aerodrome |
| GroundLightSystem | owner | The organisation that owns the ground light system. | Organisation |
| GroundLightSystem | availability | The operational status of the ground light system. | LightStatus |
| GroundLightSystem | supportingStructure | The VerticalStructure which supports the GroundLightSystem | VerticalStructure |
| GroundLightSystem | pilotControlledLighting | The PilotControlledLighting service which activates the GroundLightSystem | PilotControlledLighting |
| GroundLightSystem | element | A component of the ground light system. | LightElement |
| GroundLightSystem | usage | A code indicating the usage of an entity. | CodeEntityUsageType |
| GroundLightSystem | length | The length of the lighting system. | ValDistanceType |
| GroundLightSystem | isEmergencyLightingAvailable | The availability of a back-up lighting system to be used in case of failure of the main lighting system. | Boolean |
| GroundLightSystem | intensityLevel | An indication of the relative intensity of the ground lighting system. | CodeLightIntensityType |
| GroundLightSystem | distanceToRunwayThreshold | The distance measurement of an identified light system point to the associated runway threshold. | ValDistanceType |
| GroundLightSystem | colour | An indication of the global colour of the ground lighting system. | CodeColourType |
| GroundLightSystem | - | One or more light sources located on the ground that provide visual assistance. | - |
| GroundHandling | aircraft | The aircraft subject to ground handling. | Aircraft |
| GroundHandling | location | The airspace to be monitored for emissions during ground handling. | Airspace |
| GroundHandling | startTime | The time at which Ground Handling services start for a flight. | DateTimeWithPlanningType |
| GroundHandling | endTime | The time at which Ground Handling services end for a flight. | DateTimeWithPlanningType |
| GroundHandling | duration | The total duration of the ground handling of the aircraft. | DurationWithPlanningType |
| GroundHandling | - | Services necessary for an aircraft's arrival at, and departure from, an airport, other than air traffic services. | - |
| GeoTemporalEnabledEntity | - | An entity which is both geospatial in character and has temporal aspects. | - |
| GeomagneticActivity | interplanetaryKIndexLevel | A 3-hourly quasi-logarithmic local index of geomagnetic activity relative to an assumed quiet-day curve for the recording site. The K index measures the deviation of the most disturbed component. | Decimal |
| GeomagneticActivity | geomagneticStormLevelScale | The correlation of geomagnetic storm related space weather events with their likely effects on technological systems. | CodeSpaceWeatherScaleType |
| GeomagneticActivity | - | Disturbances in the geomagnetic field caused by gusts in the solar wind that blows by the Earth. | - |
| GeoEnabledEntity | relativeLocation | The location of an entity expressed in relation to another entity. | GeoEnabledEntity |
| GeoEnabledEntity | volume | The geometry of the entity expressed as a volume. | GM_Solid |
| GeoEnabledEntity | surfaceExtent | The geometry of the entity expressed as a surface or area described by a closed line. | GM_Surface |
| GeoEnabledEntity | position | The geometry of the entity expressed as the position of a point on the surface of the Earth. | GM_Point |
| GeoEnabledEntity | curveExtent | The geometry of the entity expressed as a curve which is a connected sequence of points. | GM_Curve |
| GeoEnabledEntity | - | An entity which has a geospatial character. | - |
| GeoBorder | type | The type of geographical border. | CodeGeoBorderType |
| GeoBorder | name | The name of the geographical border. | CharacterString |
| GeoBorder | - | A physical or political border. | - |
| Gate | availability | The availability of the gate. | ApronAreaAvailability |
| Gate | terminal | Terminal served by the gate. | Terminal |
| Gate | useMode | The Gate may be used for arrival, for departure, or both. | CodeAirportMovementType |
| Gate | isUsableForTransit | Indication that the gate can be used for transit. | Boolean |
| Gate | internationalType | The gate may be reserved for domestic/national flights or for international flights (Schengen or not). | CodeInternationalFlightType |
| Gate | designator | The textual designator of the gate. For example, 13, 84 A, etc.. | CharacterString |
| Gate | - | Access to an airport terminal on the passenger side. | - |
| Gangway | width | The measured overall width available for the gangway. | ValDistanceType |
| Gangway | material | A code used to identify the material(s) used in the construction of the structure. | CodeVerticalStructureMaterialType |
| Gangway | length | The measured overall length available for the gangway. | ValDistanceType |
| Gangway | - | A variable-sloped pedestrian walkway that links a fixed structure or land with a floating structure. | - |
| GalacticCosmicRay | backgroundThresholdPercentage | The percentage of background galactic cosmic ray intensity as observed by neutron monitors. | Decimal |
| GalacticCosmicRay | - | Highly energetic radiation thought to be created by supernovae, etc., where the outer layers of an exploding star are shock-accelerated to enormous speeds. This radiation, primarily protons, crosses the galaxy and possibly even between galaxies. | - |
| Fuel | category | A code indicating a type of fuel for aircraft and helicopters. | CodeFuelType |
| Fuel | - | The type(s) of fuel available for aircraft and helicopters. | - |
| FourDimensionalPointType | verticalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| FourDimensionalPointType | verticalDatum | The set of reference points or a mathematical model of the Earth's surface (a datum) against which vertical position measurements are made as basis for measuring elevations. | CodeVerticalDatumType |
| FourDimensionalPointType | verticalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| FourDimensionalPointType | verticalAccuracy | The difference between the recorded elevation of an entity and its true elevation referenced to the same vertical datum expressed as a linear error at 95 percent probability. | ValDistanceType |
| FourDimensionalPointType | time | The time corresponding to the point. | DateTime |
| FourDimensionalPointType | temporalAccuracy | The difference between the recorded time of an entity and its true time. | ClockTime |
| FourDimensionalPointType | horizontalResolution | A distance corresponding to the number of units or digits to which a measured or calculated value is expressed and used. | ValDistanceType |
| FourDimensionalPointType | horizontalAccuracy | The difference between the recorded horizontal coordinates of an entity and its true position referenced to the same geodetic datum expressed as a circular error at 95 percent probability. | ValDistanceType |
| FourDimensionalPointType | horizontalConfidenceLevel | A statistical measure of the estimated confidence with which the data captured met its required accuracy. A required confidence level of 90% indicates that 90% of the measured point(s) should meet their respective accuracy requirements. | Integer |
| FourDimensionalPointType | height | The vertical distance of a level, a point or an object considered as a point, measured from a specified datum. | ValVerticalDistanceType |
| FourDimensionalPointType | geoidUndulation | The distance of the geoid above (positive) or below (negative) the mathematical reference ellipsoid at the location of the point. | ValDistanceType |
| FourDimensionalPointType | elevation | The vertical distance of a point or a level, on or affixed to the surface of the earth, measured from mean sea level. | ValAltitudeType |
| FourDimensionalPointType | altitude | The vertical distance of a level, a point or an object considered as a point, measured from mean sea level (MSL). | ValAltitudeType |
| FourDimensionalPointType | - | Derived from GM_Point and extended to include properties for describing a three dimensional point with a time. | - |
| FormationComponent | fleetAircraft | The aircraft in the formation component | Aircraft |
| FormationComponent | aircraftType | The aircraft type that is common to the machines belonging to the military fleet. | AircraftType |
| FormationComponent | owner | The Unit that owns the fleet. | Unit |
| FormationComponent | numberOfAircraft | Number of aircraft with the same aircraft type in the fleet of one unit | Integer |
| FormationComponent | - | A set of airframes that belong to one Unit and are of the same type. | - |
| FloatingDockSite | seaplaneLandingArea | The SeaplaneLandingArea associated with the FloatingDockSite | SeaplaneLandingArea |
| FloatingDockSite | width | The overall measured width available for the floating dock. | ValDistanceType |
| FloatingDockSite | material | A code used to identify the material(s) used in the construction of the structure. | CodeVerticalStructureMaterialType |
| FloatingDockSite | length | The overall measured length available for the floating dock. | ValDistanceType |
| FloatingDockSite | - | Floating facility which can serve as a mooring place for vessels or as a floating dry dock. | - |
| FloatingBarge | width | The overall measured width available for the floating barge. | ValDistanceType |
| FloatingBarge | material | A code used to identify the material(s) used in the construction of the structure. | CodeVerticalStructureMaterialType |
| FloatingBarge | length | The overall measured length available for the floating barge. | ValDistanceType |
| FloatingBarge | - | A long, large, usually flatbottom boat for transporting freight that is generally unpowered and towed or pushed by other craft. A barge anchored offshore makes an excellent seaplane service facility. An office, lounge, or shop is normally included aboard and floating docks can be added alongside the barge. The barge may be anchored directly to the shore or to a pier by booms and a gangway or anchored offshore in a fixed position. | - |
| FlightRoutingElement | airspaceElement | Airspace which is impacted by a flight restriction. | Airspace |
| FlightRoutingElement | aerialRefuellingElement | Aerial refuelling element which is impacted by a flight restriction. | AerialRefuelling |
| FlightRoutingElement | routePortionElement | Route portion which is impacted by a flight restriction. | RoutePortion |
| FlightRoutingElement | standardInstrumentArrivalElement | Standard instrument arrival which is impacted by a flight restriction. | StandardInstrumentArrival |
| FlightRoutingElement | standardInstrumentDepartureElement | SID which is impacted by a flight restriction. | StandardInstrumentDeparture |
| FlightRoutingElement | flightLevel | Level associated with the routing element. | FlightRestrictionLevel |
| FlightRoutingElement | directFlightElement | Direct flight segment which is impacted by a flight restriction. | RouteTrajectorySegment |
| FlightRoutingElement | pointElement | Significant point which is impacted by a flight restriction. | SignificantPoint |
| FlightRoutingElement | aerodromeElement | Aerodrome which is impacted by a flight restriction. | Aerodrome |
| FlightRoutingElement | speedReference | A code indicating the reference system for the speed value. | CodeSpeedReferenceType |
| FlightRoutingElement | speedCriteria | A code indicating whether the speed is a maximum, a minimum or an imposed value. | CodeComparisonType |
| FlightRoutingElement | speed | The value of the speed limit imposed on a routing element. | ValSpeedType |
| FlightRoutingElement | orderNumber | A number in sequence used to indicate the order of the routing element in the flight restriction routing to which it belongs. | Integer |
| FlightRoutingElement | - | An airspace, route or point that is concerned by a specified flight restriction. | - |
| FlightRestrictionRoute | routeElement | Routing element concerned by a specified flight restriction. | FlightRoutingElement |
| FlightRestrictionRoute | contact | The contact information of the relevant authority which can grant the permission for using the routing. | ContactInformation |
| FlightRestrictionRoute | isPriorPermissionRequired | Indication that a minimum lead time is required for contacting the relevant authority in order to get permission for using the routing. | Boolean |
| FlightRestrictionRoute | - | A sequence of routing elements (points, route portions or airspace) that must/must not appear in the specified order in the flight plan of an aircraft fulfilling the conditions of the related Flight Restriction. | - |
| FlightRestrictionLevel | cruisingLevelRange | A cruising level band associated with a flight restriction. | DistanceVerticalRangeType |
| FlightRestrictionLevel | cruisingLevel | A cruising level associated with a flight restriction. | ValVerticalDistanceType |
| FlightRestrictionLevel | - | A single level or a level band associated with a flight restriction, either condition or routing element. | - |
| FlightRestriction | flight | Fflight affected by the flight restriction. | FlightConditionCombination |
| FlightRestriction | regulatedRoute | Route regulated by the flight restriction | FlightRestrictionRoute |
| FlightRestriction | type | A code indicating if the restriction is an interdiction or a mandatory routing. | CodeFlightRestrictionType |
| FlightRestriction | instruction | A description of the operational instructions which form the flight restriction. | CharacterString |
| FlightRestriction | designator | A coded value which identifies the restriction. | CharacterString |
| FlightRestriction | - | A rule meant to regulate the use of the route network, by identifying a set of flights which fulfil a combination of elementary flow conditions and either forbidding them on a particular routing or obliging them to follow one routing out of a set of mandatory alternatives. | - |
| FlightCrewApplicationAndApproval | qualification | A particular equipment or procedure qualification. | Qualification |
| FlightCrewApplicationAndApproval | runwayVisualRangeMinima | Operating minima when special meteorological conditions exist. | ValDistanceType |
| FlightCrewApplicationAndApproval | - | Equipment and procedures for which the air crew is qualified. | - |
| FlightConfiguration | mainEnginesFuelFlow | The fuel flow for the main engines of an aircraft at a specific time during a flight in terms of amount per time unit. | Decimal |
| FlightConfiguration | isTCASResolutionAdvisoryActive | Flag indicating if TCAS Resolution Advisory is active =0 TCAS II or ACAS RA not active =1 TCAS RA active | Boolean |
| FlightConfiguration | isSpecificServiceCapability | Indication whether specific BDS-registers are used, without additional specifications. | Boolean |
| FlightConfiguration | isSingleAntenna | Single Antenna = 0 Antenna Diversity = 1 Single Antenna only | Boolean |
| FlightConfiguration | isReceivingATCServices | Indication whether the aircraft is receiving ATC Services. | Boolean |
| FlightConfiguration | isPositionOffsetApplied | Position Offset Applied = 0 Position transmitted is not ADS-B position reference point = 1 Position transmitted is the ADS-B position reference point | Boolean |
| FlightConfiguration | isIDENTSwitchActive | Indication that the IDENT"-switch is active." | Boolean |
| FlightConfiguration | barometricPressureSetting | The barometric pressure reading used to adjust a pressure altimeter for variations in existing atmospheric pressure or to the standard altimeter setting. | ValPressureType |
| FlightConfiguration | auxiliaryPowerUnitFuelFlow | The fuel flow for the auxilliary power unit of aircraft at a specific time during a flight in terms of amount per time unit. | Decimal |
| FlightConfiguration | aircraftMass | The mass of the aircraft at a specific time during the flight. | ValMassType |
| FlightConfiguration | - | Configuration of aircraft in operation. | - |
| FlightConditionElement | aircraft | A condition based on an aircraft. | Aircraft |
| FlightConditionElement | airspaceCondition | A condition based on an airspace. | Airspace |
| FlightConditionElement | aerialRefuellingCondition | A condition based on an aerial refuelling. | AerialRefuelling |
| FlightConditionElement | routePortionCondition | A condition based on a route portion. | RoutePortion |
| FlightConditionElement | standardInstrumentArrivalCondition | A condition based on an standard instrument arrival. | StandardInstrumentArrival |
| FlightConditionElement | standardInstrumentDepartureCondition | A condition based on an SID. | StandardInstrumentDeparture |
| FlightConditionElement | operationalCondition | A condition based on operational circumstances. | FlightConditionCircumstance |
| FlightConditionElement | operand | A combination of flight conditions. | FlightConditionCombination |
| FlightConditionElement | directFlightCondition | A condition based on a direct flight. | RouteTrajectorySegment |
| FlightConditionElement | weather | A condition based on the weather. | WeatherCondition |
| FlightConditionElement | organisationCondition | A condition based on an organisation. | Organisation |
| FlightConditionElement | significantPointCondition | A condition based on a significant point. | SignificantPoint |
| FlightConditionElement | flightLevel | Flight level associated with a flight condition element. | FlightRestrictionLevel |
| FlightConditionElement | aerodromeCondition | A condition based on an aerodrome. | Aerodrome |
| FlightConditionElement | borderCrossingCondition | A condition based on the crossing of the common border between two adjacent airspaces. | AirspaceEntry |
| FlightConditionElement | index | A sequence number used to indicate the order of the operand when composing the flight condition combination. | Integer |
| FlightConditionElement | - | An operand in a flight condition combination. | - |
| FlightConditionCombination | element | An element of the flight condition. | FlightConditionElement |
| FlightConditionCombination | logicalOperator | The type of operation combining an elementary condition or a previously defined combination with other elementary conditions or previously defined combinations. | CodeLogicalOperatorType |
| FlightConditionCombination | - | A combination of conditions involving: 1) an operator such as \AND\", \"OR\", \"AND NOT\", \"SEQUENCE\", \"NONE\" and 2) one or more operands, each of these being either a condition element or another combination of conditions." | - |
| FlightConditionCircumstance | relationWithLocation | A code qualifying a location (such as an airspace, aerodrome, point, etc.) when used as condition element. | CodeLocationQualifierType |
| FlightConditionCircumstance | isReferenceLocation | A code indicating if the condition element is a reference location for the flight restriction, i.e. if the time schedule associated with the restriction must be considered as applicable for that flight condition element. | Boolean |
| FlightConditionCircumstance | - | Circumstance related to the elementary condition (such as departing from an aerodrome), which is used to further refine the selection of flights being affected by the restriction. | - |
| FlightCapability | aircraftCapability | The ability of an aircraft or an aircraft equipment to provide a service or perform a function that, either on its own or with other services or functions, can deliver a definable level of performance. | AircraftCapability |
| FlightCapability | flightCrewApplicationAndApproval | Equipment and procedures for which the air crew is qualified. | FlightCrewApplicationAndApproval |
| FlightCapability | rnpCapability | Indication about which Required Navigation Performance requirements can be met by the aircraft while operating in the context of a particular airspace when supported by the appropriate navigation infrastructure. | CodeRNPCapabilityType |
| FlightCapability | rnavCapability | Indication about which Area Navigation requirements can be met by the aircraft while operating in the context of a particular airspace when supported by the appropriate navigation infrastructure. | CodeRNAVFlightCapabilityType |
| FlightCapability | navigationCapability | The navigation capability of the aircraft and associated flight crew qualifications. | CodeNavigationCapabilityType |
| FlightCapability | communicationCapability | The capability of the aircraft and associated flight crew qualifications to communicate with ATS units. | CodeCommunicationCapabilityType |
| FlightCapability | - | The capabilities of the flight comprising of the: a) presence of relevant serviceable equipment on board the aircraft; b) equipment and capabilities commensurate with flight crew qualifications; and c) where applicable, authorization from the appropriate authority. | - |
| Flight | aircraft | The aircraft enabling the flight. | Aircraft |
| Flight | actualPassedWaypoint | The actual waypoint passed by the flight. | InfrastructurePoint |
| Flight | arrivalOperations | The set of flight operations following procedures associated with the destination aerodrome. | ArrivalOperations |
| Flight | departureOperations | The set of flight operations following procedures associated with the departure aerodrome. | DepartureOperations |
| Flight | emergencyPhase | Emergency situation in which the flight may be. | EmergencyPhase |
| Flight | diplomaticClearance | Diplomatic clearance applicable to the flight. | DiplomaticClearance |
| Flight | coordination | The coordination of the conditions of transfer between ATC units successively in control of the flight. | CoordinationAndTransfer |
| Flight | destinationAerodrome | The aerodrome of intended landing. | Aerodrome |
| Flight | departureAerodrome | The aerodrome from which the flight departs. | Aerodrome |
| Flight | alternateAerodrome | An aerodrome to which an aircraft may proceed when it becomes either impossible or inadvisable to proceed to or to land at the aerodrome of intended landing where the necessary services and facilities are available, where aircraft performance requirements can be met and which is operational at the expected time of use. | Aerodrome |
| Flight | pilot | The pilot in command of the aircraft. | PilotInCommand |
| Flight | flightCapability | The capabilities of the flight. | FlightCapability |
| Flight | responsibleATSU | The ATSU controlling the flight. | Unit |
| Flight | routeTrajectory | The description of movement of an aircraft. | RouteTrajectory |
| Flight | airspaceEntry | Airspace entry event occurring during the flight. | AirspaceEntry |
| Flight | operator | The aircraft operator of the flight. | AircraftOperator |
| Flight | ssrCode | SSR code assigned to the flight. | SSRCode |
| Flight | militaryAircraftOperator | The Unit that flies the Sortie. | MilitaryAuthority |
| Flight | dataLinkAuthority | The Air traffic services unit (ATSU) with which the aircraft is communicating using Controller-pilot data link communications (CPDLC). | Unit |
| Flight | diversionRecoveryFlight | Indication that a flight is the recovery for a flight that changed its original destination. | Flight |
| Flight | previousFlight | The arrival flight that will use the same aircraft. | Flight |
| Flight | nextFlight | The departure flight that will use the same aircraft. | Flight |
| Flight | airspaceExit | Airspace exit event occurring during the flight. | AirspaceExit |
| Flight | aircraftIdentification | The aircraft identifiation of the flight. | AircraftIdentification |
| Flight | formationComponent | Description of the set of airframes belonging to the formation flight that are of the same type. | FormationComponent |
| Flight | emergencyContact | Emergency contact information. | ContactInformation |
| Flight | type | The type of the flight. | CodeFlightType |
| Flight | totalEstimatedElapsedTime | For IFR flights, the estimated time required from take-off to arrive over that designated point, defined by reference to navigation aids, from which it is intended that an instrument approach procedure will be commenced, or, if no navigation aid is associated with the destination aerodrome, to arrive over the destination aerodrome. For VFR flights, the estimated time required from take-off to arrive over the destination aerodrome. | TM_Duration |
| Flight | statusForCount | A flight status for limiting the traffic count. | CodeFlightStatusForCountType |
| Flight | statusFFICE | Status information for information management of the flight information. | CodeFFICEStatusType |
| Flight | reasonForSpecialHandling | The reason for special handling of a flight by ATS. | CodeReasonForSpecialHandlingType |
| Flight | readyStatus | The flight readiness status. | CodeFlightReadyStatusType |
| Flight | preferredCourseDeviationIfReRoute | Preferring a southerly course deviation if a re-route is necessary. | CodeCompassPointType |
| Flight | origin | An indication of the origin of the flight with regard to the national borders. | CodeFlightOriginType |
| Flight | operatorFlightPriority | Value between 0 and 100 that the flight operator assigns to the aircraft to indicate a relative level or priority among its aircrafts arriving in a given airport in case of traffic, in order to assign delays. | Integer |
| Flight | numberOfAircraft | Number of aircraft flying in a formation in which the aircraft are governed by one flight plan. | Integer |
| Flight | isReRouteOf120NmAcceptable | Any reroute less than 120 nm or less is acceptable. | Boolean |
| Flight | isIFPLIdentifierTemporary | For an AFIL flight, indication whether the IFPL identifier is temporary assigned by FDP. | Boolean |
| Flight | isGroundDelayPreferrableOverReRoute | Preferring a ground delay over a reroute for pre-departure flights. | Boolean |
| Flight | isFlightManagementForced | Indication whether a change in the management of the flight has been forced by a manual arbitration. | Boolean |
| Flight | isAirborne | Indication whether the flight is airborne. | Boolean |
| Flight | isAbleToAcceptSpecificRunway | The operator may be unwilling or unable to accept a specific runway. | Boolean |
| Flight | isAbleToAcceptCirclingApproaches | The aircraft operator may be unwilling to perform circling approaches. | Boolean |
| Flight | isAbleToAcceptAirToAirSeparation | The aircraft operator may be unwilling to perform air-to-air separation. | Boolean |
| Flight | ifplIdentifier | A unique flight plan identifier allocated by the IFPS. | CharacterString |
| Flight | hasSpecialRequirements | Indicator that the flight is expected to be operating in accordance with regulations issued by the relevant State for aircraft operating as State aircraft, as per Article 3 of the Convention on International Civil Aviation (Doc 7300), and for aircraft operating in accordance with State regulations for non-standard flying activities, normally through the use of reserved airspace. | Boolean |
| Flight | globallyUniqueFlightIdentifier | A single reference for FF-ICE information pertinent to a flight that is unique globally. | CharacterString |
| Flight | fuelEndurance | The estimated maximum length of time the aircraft can spend in the cruise phase of flight, determined by the amount of fuel at take-off. | TM_Duration |
| Flight | flightDataKind | Indication whether the flight information is real or a copy of a real flight (alternative or what-if flight). | CodeFlightDataKindType |
| Flight | dateOfDeparture | The date of flight departure. | Date |
| Flight | - | The operation of an aircraft which, in the case of a manned aircraft, takes place between the time any person boards the aircraft with the intention of flight until such time as all such persons have disembarked, or in the case of an unmanned aircraft, takes place between the time the aircraft is ready to move with the purpose of flight until such time as it comes to rest at the end of the flight and the primary propulsion system is shut down. | - |
| FireFightingService | standard | A code indicating the standard referred to by the fire fighting category value. | CodeAviationStandardsType |
| FireFightingService | category | A standard categorisation of the rescue and fire-fighting capabilities of an aerodrome on the basis of the length and fuselage width of the largest aircraft to be rescued. | CodeFireFightingType |
| FireFightingService | - | An airport service that provides rescue and fire fighting capabilities for aircraft in emergency at and around the airport. | - |
| FinalProfile | altitude | A declared altitude defined for a final segment. | ApproachAltitudeTable |
| FinalProfile | distance | A declared distance defined for a final segment. | ApproachDistanceTable |
| FinalProfile | timing | A declared time defined for a final segment. | ApproachTimingTable |
| FinalProfile | - | The profile view of a final segment defined for an approach procedure. | - |
| FinalLeg | visualDescentPoint | A defined point on the final approach course of a nonprecision straight-in approach procedure from which normal descent from the MDA to the runway touchdown point may be commenced, provided visual reference is established. | InfrastructurePoint |
| FinalLeg | finalPathAlignmentPoint | A point defined by a latitude, longitude and MSL elevation used in conjunction with the LTP and the geometric center of the WGS-84 ellipsoid to define the vertical plane of a PA RNAV final approach course. | InfrastructurePoint |
| FinalLeg | condition | A specific condition established for the final segment leg. | ApproachCondition |
| FinalLeg | finalApproachSegmentDataBlock | Data used in the CRC calculation of the FMS box to insure the final segment of an approach procedure has not been modified. | FinalApproachSegmentDataBlock |
| FinalLeg | isRNPDMEAuthorised | Indication whether DME/DME RNP 0.3 is allowed. | Boolean |
| FinalLeg | minimumBarometricVerticalNavigationTemperature | The aerodrome temperature below which the use of Baro-VNAV is not authorized to the LNAV/VNAV DA. | ValTemperatureType |
| FinalLeg | landingSystemCategory | Landing system category. | CodeInstrumentRunwayType |
| FinalLeg | guidanceSystem | Guidance system used on the final approach segment of an instrument approach procedure. | CodeFinalGuidanceType |
| FinalLeg | courseOffsetSide | Indication on which side of the extended runway centreline the final approach course lies, when viewed from the Final Approach Fix. | CodeRelativePositionType |
| FinalLeg | courseOffsetDistance | The distance between the final approach course and extended runway centreline at a point located 3000 ft from the landing threshold point, measured perpendicular to the extended runway centreline. | ValDistanceType |
| FinalLeg | courseOffsetAngle | The offset angle between the final approach course and the extended runway centreline. | Angle |
| FinalLeg | courseCentrelineIntersect | Indication whether the intersection of the final approach course with the extended runway centreline is located before or after the landing threshold point. | CodeRelativePositionType |
| FinalLeg | courseCentrelineDistance | The distance from the landing threshold point to the point where the extended runway centreline intersects the final approach course. | ValDistanceType |
| FinalLeg | - | A segment leg designed in accordance with the rules for final segments. | - |
| FinalApproachSegmentDataBlock | verticalAlarmLimit | Half the length of a segment on the vertical axis (perpendicular to the horizontal plane of WGS-84 ellipsoid), with its centre being at the true position, which describes the region which is required to contain the indicated vertical position with a probability of 1-E-7 per approach, assuming the probability of a GPS satellite integrity failure being included in the position solution is less than or equal to E-4 per hour. | Decimal |
| FinalApproachSegmentDataBlock | thresholdCourseWidth | The width of the lateral course at the Landing Threshold Point (LTP). This width, in conjunction with the location of the Flight Path Alignment Point (FPAP) defines the sensitivity of the lateral deviations throughout the approach. | ValDistanceType |
| FinalApproachSegmentDataBlock | satelliteBasedAugmentationSystemServiceProvider | SBAS Service Provider Identifier. A number from 0 to 15 that associates the approach procedure to a particular satellite based approach system service provider. | Integer |
| FinalApproachSegmentDataBlock | routeIndicator | Route Indicator. A single alpha character (A through Z or blank, omitting I and O) used to differentiate between multiple final approach segments to the same runway or heliport. | CharacterString |
| FinalApproachSegmentDataBlock | remainderCyclicRedundancyCheck | Hexadecimal representation of the 32-bit CRC used to check the integrity of the FAS data block. | ValHexType |
| FinalApproachSegmentDataBlock | referencePathIdentifier | Reference Path Identifier. A four-character identifier that is used to confirm selection of the correct approach procedure. | CharacterString |
| FinalApproachSegmentDataBlock | referencePathDataSelector | Reference Path Data Selector (RPDS). A number (0-48) that enables automatic tuning of a procedure by LAAS avionics. | Integer |
| FinalApproachSegmentDataBlock | operationType | Operation Type. A number from 0 to 15 that indicates the type of the final approach segment. | Integer |
| FinalApproachSegmentDataBlock | lengthOffset | Distance from the stop end of the runway to the Flight Path Alignment Point | ValDistanceType |
| FinalApproachSegmentDataBlock | horizontalAlarmLimit | The radius of a circle in the horizontal plane (the local plane tangent to the WGS-84 ellipsoid), with its centre being at the true position, which describes the region which is required to contain the indicated horizontal position with the required probability for a particular navigation mode assuming the probability of a GPS satellite integrity failure being included in the position solution is less than or equal to E-4 per hour. | Decimal |
| FinalApproachSegmentDataBlock | codeICAO | The first two designators of the ICAO location identifier, as identified in ICAO Doc 7910. | CharacterString |
| FinalApproachSegmentDataBlock | approachPerformanceDesignator | Approach Performance Designator. A number from 0 to 7 that identifies the type of approach. | Integer |
| FinalApproachSegmentDataBlock | - | The additional information about the Precision Final Segment. Most attributes describe the LPV path point record required for WAAS procedures. | - |
| Facility | icaoPrefixCode | ICAO Prefix Code of Facility. | CharacterString |
| Facility | facilityType | The category of the Facility. | CharacterString |
| Facility | facilityName | Name of the Facility. | CharacterString |
| Facility | fiaoCode | Flight Inspection Code of Facility. | CharacterString |
| Facility | commissionedDate | Date that Facility was commissioned. | Date |
| Facility | - | A physical structure housing personnel or equipment supporting aviation functions and processes. | - |
| EquipmentUnavailableAdjustmentColumn | visibilityAdjustment | Adjustment for the corresponding visibility value. | ValVerticalDistanceType |
| EquipmentUnavailableAdjustmentColumn | isLandingSystemLightsAvailable | Indication whether landing system lights are available. | Boolean |
| EquipmentUnavailableAdjustmentColumn | isEquipmentRVRAvailable | Indication whether RVR reading equipment is available. | Boolean |
| EquipmentUnavailableAdjustmentColumn | isApproachLightingInoperative | Indication whether the approach lighting is inoperative. | Boolean |
| EquipmentUnavailableAdjustmentColumn | guidanceEquipment | The guidance equipment which is inoperative | CodeApproachType |
| EquipmentUnavailableAdjustmentColumn | - | Adjustments that need to be applied in case equipment is inoperative. | - |
| EquipmentUnavailableAdjustment | adjustmentINOPCol | The adjustment to the minimum based on the inoperable equipment. | EquipmentUnavailableAdjustmentColumn |
| EquipmentUnavailableAdjustment | type | Indication whether the specified altitude/height is adjusted for the case when certain equipment is unavailable. | CodeEquipmentUnavailableType |
| EquipmentUnavailableAdjustment | isAdjustedWhenApproachLightingInoperative | Indication whether the specified altitude/height is adjusted for the case when the approach lighting is inoperative. | Boolean |
| EquipmentUnavailableAdjustment | - | Adjustments to minima when equipment is not available. | - |
| EquipmentCapability | terrainAwarenessAndGroundProximityAlertingCapability | The capability of the aircraft to warn or alert about the proximity of the ground. | CodeTerrainAwarenessAndGroundProximityAlertingCapability |
| EquipmentCapability | isCapable | Indication whether the aircraft equipment has this type of capability. | Boolean |
| EquipmentCapability | classB2TransmitPowerCapability | The class B2 power transmission capability. | CodeClassB2TransmitPowerCapabilityType |
| EquipmentCapability | acasCapability | The capability of the airborne collision avoidance system. | CodeACASCapabilityType |
| EquipmentCapability | - | A particular aircraft equipment capability. | - |
| EntityCollection | metadata | Metadata about the EntityCollection. | MD_Metadata |
| EntityCollection | member | An entity that is member of the collection. | Entity |
| EntityCollection | annotation | A general text note for the entity collection. | Note |
| EntityCollection | - | A collection of entities. | - |
| Entity | metadata | Metadata about the Entity. | MD_Metadata |
| Entity | annotation | A general text note for the entity or for one of its properties. | Note |
| Entity | lifecycleStageStatus | The lifecycle stage of data to enable controls, such as allowing or prohibiting changes to data that is in a specific status, or making data available to other systems when it is in a certain status. | CharacterString |
| Entity | identifier | Special unique identifier permanently assigned to an entity. | IdentifierType |
| Entity | contextUsage | The intended purpose of the data, whether that data is intended for publication, future development, research and development, or future predictions. | CharacterString |
| Entity | - | A definition (type) of an data (ATM) item of interest that is implementation independent and it is subject to constraints. | - |
| Engine | type | An indication of the type of aircraft engine. | CodeAircraftEngineType |
| Engine | maximumRatedThrust | The maximum rated thrust. | Decimal |
| Engine | - | A unit used or intended to be used for aircraft propulsion. It consists of at least those components and equipment necessary for functioning and control, but excludes the propeller/rotors (if applicable). | - |
| EmergencyPhase | lastContactUnit | The last ATS unit which had two-way contact with the aircraft. | Unit |
| EmergencyPhase | lastReportedPosition | Last reported aircraft position. | RouteTrajectoryPoint |
| EmergencyPhase | type | The type of emergency phase. | CodeEmergencyPhaseType |
| EmergencyPhase | timeAtLastReportedPosition | Time at last reported aircraft position. | ClockTime |
| EmergencyPhase | timeOfLastTwoWayContact | Time of the last two-way contact with the aircraft. | ClockTime |
| EmergencyPhase | reason | The emergency reason. | CharacterString |
| EmergencyPhase | frequencyOfLastContact | Transmitting or receiving frequency of the last two-way contact with the aircraft. | ValFrequencyType |
| EmergencyPhase | emergencyStatus | The status of the emergency. | CodeEmergencyStatusType |
| EmergencyPhase | communicationDefect | An issue in the communication between the ground and the flight. | CharacterString |
| EmergencyPhase | actionTaken | A description of an action taken by an Air Traffic Service unit, in the event of search and rescue. | CharacterString |
| EmergencyPhase | - | A generic term meaning, as the case may be, uncertainty phase, alert phase or distress phase. | - |
| DurationWithPlanningType | planningStatus | Qualification of the planning stage where the information is coming from. | CodePlanningStatusType |
| DurationWithPlanningType | - | Describes the length or distance in the temporal dimension and allows the planning status to be recorded. | - |
| Document | issuer | The organisation which issed the document. | Organisation |
| Document | versionNumber | The version number of the document. | Number |
| Document | publicationEndDate | The date when the document is no longer in effect. | DateTime |
| Document | publicationDate | The planned or active date, the official date a document goes into effect and is actually being used. | DateTime |
| Document | documentURL | The web address of the document in URL format. | CharacterString |
| Document | documentType | The type of document. | CharacterString |
| Document | documentIdentifier | The document identifier. | CharacterString |
| Document | - | A piece of written, printed, or electronic matter that provides information or evidence or that serves as an official record. | - |
| DockingArea | pier | A pier included in the docking area. | Pier |
| DockingArea | floatingBarge | A floating barge included in the docking area. | FloatingBarge |
| DockingArea | hoist | A hoist capability available at the docking area. | Hoist |
| DockingArea | dockSite | Seaplane landing area dock site. | FloatingDockSite |
| DockingArea | gangway | A gangway included in the docking area. | Gangway |
| DockingArea | marineRailway | A marine railway included in the docking area. | MarineRailway |
| DockingArea | name | A commonly used name associated with the Docking Area. | CharacterString |
| DockingArea | isPierAvailable | Indicates that a pier is available in the Docking Area. | Boolean |
| DockingArea | isMarineRailwayAvailable | Indicates that a marine railway is available in the Docking Area. | Boolean |
| DockingArea | isHoistAvaible | Indicates that a hoist is available in the Docking Area. | Boolean |
| DockingArea | isGangwayAvailable | Indicates that a Gangway is available in the Docking Area. | Boolean |
| DockingArea | isFloatingDockAvailable | Indicates that a Floating Dock is available in the Docking Area | Boolean |
| DockingArea | isFloatingBargeAvailable | Indicates that a Floating Barge is available in the Docking Area | Boolean |
| DockingArea | - | A defined area on a seaplane base either fixed or floating, intended to accommodate aircraft for purposes of loading or unloading passengers or cargo, refueling, parking, or maintenance. | - |
| DME | type | The particular spectrum characteristics or accuracy of the DME. | CodeDMEType |
| DME | ghostFrequency | The frequency of a virtual VHF facility paired with the DME according to ICAO Annex 10, table A, ch.3. | ValFrequencyType |
| DME | displace | The distance from the DME antenna to the position where the zero range indication occurs in the DME receiver. | ValDistanceType |
| DME | channel | The channel of the DME. | CodeDMEChannelType |
| DME | - | Ultra High Frequency (UHF) ground equipment that is used in conjunction with airborne equipment to determine distance between the airborne and ground equipment. | - |
| DistanceVerticalRangeType | upper | The upper limit of the vertical distance range. | ValVerticalDistanceType |
| DistanceVerticalRangeType | lower | The lower limit of the vertical distance range. | ValVerticalDistanceType |
| DistanceVerticalRangeType | - | The area of variation of a vertical distance between upper and lower limits. | - |
| DistanceIndication | usedPoint | A significant point which defines the facility makeup. | SignificantPoint |
| DistanceIndication | fix | A selected significant point that may have references (distance and/or angle indications). | SignificantPoint |
| DistanceIndication | type | The type of distance indication. | CodeDistanceIndicationType |
| DistanceIndication | minimumReceptionAltitude | The lowest altitude that an aircraft can receive signal. | ValVerticalDistanceType |
| DistanceIndication | distance | The distance from the significant point. | ValDistanceType |
| DistanceIndication | - | A distance reference from a significant point. | - |
| DirectionFinder | informationProvision | An information service associated with the direction finder. | InformationService |
| DirectionFinder | assistedATCService | The ATC Service which is assisted by the DirectionFinder | AirTrafficControlService |
| DirectionFinder | type | The type of direction finder. | CodeDirectionFinderType |
| DirectionFinder | isDoppler | An indication whether the equipment uses the doppler effect for higher precision. | Boolean |
| DirectionFinder | - | An electronic device used to determine the position of a radio source by means of directional antennas, which receives the strongest radio signal when it is pointing directly at the transmitter. | - |
| DiplomaticClearance | participant | Nations participating to the diplomatic clearance through a Note of Accession | State |
| DiplomaticClearance | clearanceNumber | European permanent or blanket diplomatic clearance number for the calendar year or one or more national diplomatic clearance numbers. | CharacterString |
| DiplomaticClearance | - | A special permission for military transport aircraft of the participants to fly over each other country's territory and to land at and take-off from military and civilian airports (to the exception of the airports and/or areas specifically mentioned in a list of exempted airports and/or areas to be completed by each participant) whilst adhering to all national rules, international agreements, ICAO rules, restrictions described in the national military and civilian Aeronautical Information Publications, ATC regulations, NOTAMs or other special requirements. | - |
| DepartureOperations | sid | The standard instrument departure the aircraft may use after taking off. | StandardInstrumentDeparture |
| DepartureOperations | offBlockReady | Off-Block Ready event linked to the departure. | OffBlockReady |
| DepartureOperations | departureTaxiway | The taxiway allocated to the flight by ATC and used for movement between runway and apron. | Taxiway |
| DepartureOperations | departureRunway | The runway direction used for taking off. | RunwayDirection |
| DepartureOperations | departureStand | The aircraft stand from which the aircraft departs. | AircraftStand |
| DepartureOperations | offBlock | Off-Block event linked to the departure. | OffBlock |
| DepartureOperations | clearanceForDeparture | The departure clearance of the flight. | DepartureClearance |
| DepartureOperations | startUpApproval | The departure clearance authorising start-up. | StartUpClearance |
| DepartureOperations | departureGate | The embarking gate. | Gate |
| DepartureOperations | takeOff | Take-Off event linked to the departure. | TakeOff |
| DepartureOperations | boarding | The boarding of the aircraft during the departure operations. | Boarding |
| DepartureOperations | deicingProcedure | The procedure describing the progress in de-icing process. | Deicing |
| DepartureOperations | startUp | Start-up event linked to the departure. | StartUp |
| DepartureOperations | - | The set of flight operations following procedures associated with the departure aerodrome. | - |
| DepartureLegCondition | engine | Type of aircraft engine allowed for the condition. | Engine |
| DepartureLegCondition | minimumEnrouteAltitude | The altitude for an en-route segment that provides adequate reception of relevant navigation facilities and ATS communications, complies with the airspace structure and provides the required obstacle clearance. | ValVerticalDistanceType |
| DepartureLegCondition | minimumCrossingAtEnd | The lowermost vertical position at the end point, when flying on the route portion in the direction indicated in the route portion usage. | ValVerticalDistanceType |
| DepartureLegCondition | maximumCrossingAtEnd | The uppermost vertical position at the end point, when flying on the route portion in the direction indicated in the route portion usage. | ValVerticalDistanceType |
| DepartureLegCondition | - | A condition which is established for a departure leg. | - |
| DepartureLeg | departure | The SID which is composed of the departure leg. | StandardInstrumentDeparture |
| DepartureLeg | condition | A specific condition established for the departure leg. | DepartureLegCondition |
| DepartureLeg | requiredNavigationPerformance | The minimum navigation performance accuracy required in an airspace. It is the navigation performance accuracy of all the user and navigation system combinations within an airspace. | Decimal |
| DepartureLeg | minimumObstacleClearanceAltitude | The minimum altitude for a defined segment of flight that provides the required obstacle clearance. | ValVerticalDistanceType |
| DepartureLeg | - | A portion of a departure procedure as defined by two consecutive significant points. | - |
| DepartureClearance | clearedStandardInstrumentDeparture | The standard instrument departure that the flight is cleared to fly after take-off. | StandardInstrumentDeparture |
| DepartureClearance | departure | Operations for which the departure clearance applies. | DepartureOperations |
| DepartureClearance | departureAerodrome | The departure aerodrome. | Aerodrome |
| DepartureClearance | departureRunway | The runway direction from which the flight is cleared to take off. | RunwayDirection |
| DepartureClearance | departureClearanceStatus | The departure clearance status. | CodeDepartureClearanceStatusType |
| DepartureClearance | - | Authorization for an aircraft to take-off under conditions specified by an air traffic control unit. | - |
| DeicingGroup | associatedAerodrome | The aerodrome associated with this deicing group | Aerodrome |
| DeicingGroup | deicingArea | A deicing area forming part of this deicing group | DeicingArea |
| DeicingGroup | - | A group of deicing areas. | - |
| DeicingAreaMarking | markedDeicingArea | Deicing area that is marked. | DeicingArea |
| DeicingAreaMarking | - | A symbol or group of symbols displayed on the surface of a deicing area | - |
| DeicingArea | standLocation | Aircraft stand associated with the deicing area. | AircraftStand |
| DeicingArea | associatedApron | Apron associated with the deicing area. | Apron |
| DeicingArea | availability | The operational status of the deicing area. | ApronAreaAvailability |
| DeicingArea | apronElement | An apron element associated with this deicing area. | ApronElement |
| DeicingArea | taxiwayElement | A taxiway element associated with the deicing area. | TaxiwayElement |
| DeicingArea | taxiwayLocation | The taxiway associated with the deicing area. | Taxiway |
| DeicingArea | deicingArea | A deicing area associated with this deicing area. | DeicingArea |
| DeicingArea | guidanceLine | A guidance line associated with the deicing area. | GuidanceLine |
| DeicingArea | surfaceProperties | Surface characteristics of the deicing area. | SurfaceCharacteristics |
| DeicingArea | deicingGroup | The associated Deicing Group | DeicingGroup |
| DeicingArea | deicingAreaMarking | The Marking marked on the DeicingArea | DeicingAreaMarking |
| DeicingArea | - | An area comprising an inner area for the parking of an aeroplane to receive de-icing / anti-icing treatment and an outer area for the manoeuvring of two or more mobile de-icing / anti-icing equipment. | - |
| Deicing | departure | The departure operations that include the deicing. | DepartureOperations |
| Deicing | areaForDeicing | The deicing area where the deicing operation is carried out. | DeicingArea |
| Deicing | readyForDeicing | The time when the aircraft is ready to be de-iced. | DateTimeWithPlanningType |
| Deicing | endOfDeicing | The time when de-icing operations on an aircraft end. | DateTimeWithPlanningType |
| Deicing | deicingTolerance | Tolerance in deicing time | TM_Duration |
| Deicing | deicingStatus | Status of progress of the de-icing procedure. | CodeDeicingStatusType |
| Deicing | deicingPlace | De-icing location. | CodeLocationToDeiceType |
| Deicing | deicingDuration | The forecast duration of the de-icing procedure. | TM_Duration |
| Deicing | commencementOfDeicing | The time when de-icing operations on an aircraft starts. | DateTimeWithPlanningType |
| Deicing | - | De-icing operation on an aircraft that may consist of removal of snow, ice or frost from the aircraft (de-icing), and/or also application of chemicals that remain on a surface and continue to delay the reformation of ice up (anti-icing). | - |
| DateTimeWithPlanningType | valueInterpretation | Indication of how the time value should be interpreted. | CodeValueInterpretationType |
| DateTimeWithPlanningType | timeTolerance | Allowable amount of variation in time, expressed symmetrically with regards to the time value. | TimeRangeType |
| DateTimeWithPlanningType | planningStatus | Qualification of the planning stage where the information is coming from. | CodePlanningStatusType |
| DateTimeWithPlanningType | - | A combination of a date and a time type which allows the planning status to be recorded. | - |
| CrewMember | contactDetails | The contact details of the crew member. | ContactInformation |
| CrewMember | - | A person assigned by an operator to duty on an aircraft during a flight duty period. | - |
| CoordinationAndTransfer | currentCommunicationOe | The operational entity currently in communication with the flight, indicating the unique contoller that is controlling the flight. | Unit |
| CoordinationAndTransfer | transferringOe | The transferring operational entity for a given coordination. | Unit |
| CoordinationAndTransfer | previousSSRCode | The SSR code used by the flight immediately before the one communicated or requested during transfer. | SSRCode |
| CoordinationAndTransfer | previousCommunicationOe | The operational entity communicating with the aircraft in the transferring system instance before the transfer. | Unit |
| CoordinationAndTransfer | boundary | The boundary for the transfer of control. | RouteTrajectoryPoint |
| CoordinationAndTransfer | receivingCommunicationOe | The operational entity that will be in communication with the aircraft after the transfer. | Unit |
| CoordinationAndTransfer | nextSSRCode | The SSR code used by the receiving system instance. | SSRCode |
| CoordinationAndTransfer | receivingOe | The receiving operational entity for a given coordination. | Unit |
| CoordinationAndTransfer | processStatus | The state of progress of the coordination and transfer of control process (between civilian ATSUs or between a civilian and a military ATSU or with an Oceanic centre) | CodeCoordinationAndTransferStatusType |
| CoordinationAndTransfer | nonStandardReason | The reason for a non standard coordination. | CodeNonStandardReasonType |
| CoordinationAndTransfer | isStandardProcedureApplied | Indicator of whether or not the coordination process is in agreement with pre-defined criteria (agreed coordination points, flight levels on these points, ADEP, ADES, time or distance limits after which coordination is considered non standard etc.). | Boolean |
| CoordinationAndTransfer | isSSRCoderequested | Indicator of whether or not the receiving unit is requested to assign an SSR code to the flight. | Boolean |
| CoordinationAndTransfer | isNextAuthorityNotified | Indication whether the next authority has been notified or not. | Boolean |
| CoordinationAndTransfer | coordinationReason | The reason for coordination. | CodeCoordinationReasonType |
| CoordinationAndTransfer | coordinationConditionStatus | The state of coordination of the time and level at the coordination point. | CodeBasicCoordinationStatusType |
| CoordinationAndTransfer | - | A dialogue procedure between ATC Units successively in control of a flight, comprising - notification of the flight - coordination of conditions of transfer by the transferring ATC unit - coordination, if necessary, and acceptance of conditions of transfer by the accepting ATC unit - transfer of control to the accepting ATC unit. | - |
| ConvectionCell | volume | The volume of the convection cell. | AirspaceVolume |
| ConvectionCell | convection | The convection phenomenon occuring within the cell. | Convection |
| ConvectionCell | convectionCellType | Indication whether the convection cell described is the base (cell base) of a cell, or the upper part of a cell (cell top). | CodeConvectionCellType |
| ConvectionCell | convectionCellTopVariation | The observed variation of the altitude of the upper part convection cell. | CodeConvectionCellTopVariationType |
| ConvectionCell | convectionCellOvershootPosition | Location in latitude and longitude of the convection cell overshoot. | TwoDimensionalPointType |
| ConvectionCell | - | A volume of convective air. | - |
| Convection | - | In the atmosphere, convection is the dominant vertical transport process in convective boundary layers, which are common over tropical oceans and, during sunny days, over continents. Moist convection in the atmosphere is characterized by deep, saturated updrafts and downdrafts, and unsaturated downdrafts driven by the evaporation and melting of precipitation. This form of convection is made visible by cumulus clouds and cumulonimbus clouds in the case of precipitation convection. | - |
| Contour | contourValue | The value of the measure that applies to that contour. For example a pressure chart could have contours where each contour line represents a specific pressure value, this could be sorted in the contourValue. | Measure |
| Contour | - | An estimated or observed outline of a particular weather situation. | - |
| ContactInformation | address | A postal address for the contact. | PostalAddress |
| ContactInformation | networkNode | A direct link for the contact, over a data communication network. | OnlineContact |
| ContactInformation | phoneFax | A phone or fax number for the contact. | TelephoneContact |
| ContactInformation | title | The official title of the contact. | CharacterString |
| ContactInformation | name | The official name of the contact. | CharacterString |
| ContactInformation | - | Information required to enable contact with the responsible person and/or organisation. | - |
| CodeWorkAreaType | SURFACE_WORK | The work area is used for surface improvements. | - |
| CodeWorkAreaType | PARKED_AIRCRAFT | Parked or disabled aircraft or machinery. | - |
| CodeWorkAreaType | CONSTRUCTION | The work area is used for construction. | - |
| CodeWorkAreaType | - | A code indicating the type of work performed in the work area. | - |
| CodeWindCharacteristicType | VRB | Wind direction on airport surface is variable | - |
| CodeWindCharacteristicType | NORMAL | Wind on airport surface is normally described through the direction attribute | - |
| CodeWindCharacteristicType | CALM | Wind direction on airport surface is irrelevant, wind is less than 1kt | - |
| CodeWindCharacteristicType | 100_KNOTS | Forecasted wind on airport surface is more than 100kt (200 Km/h) | - |
| CodeWindCharacteristicType | - | When it is not possible to forecast a prevailing surface wind direction due to its expected variability, for example, during light wind conditions (less than 3 kt) or thunderstorms, the forecast wind direction should be indicated as variable using VRB". When the wind is forecast to be less than 1 kt the forecast wind speed should be indicated as calm. When a wind speed of 20oKm/h (100kt) or more is forecast, it should be indicated as 200Km/h (or 100kt) [ICAO ANNEX 3, recommendation 6.2.12]" | - |
| CodeWeatherSensorStatusType | VISNO_LOC | VISNO_LOC | - |
| CodeWeatherSensorStatusType | TSNO | TSNO | - |
| CodeWeatherSensorStatusType | RVRNO | RVRNO | - |
| CodeWeatherSensorStatusType | PWINO | PWINO | - |
| CodeWeatherSensorStatusType | PNO | PNO | - |
| CodeWeatherSensorStatusType | FZRANO | FZRANO | - |
| CodeWeatherSensorStatusType | CHINO_LOC | Chino Loc | - |
| CodeWeatherSensorStatusType | - | The status of sensor used in weather observation. | - |
| CodeWeatherSatelliteOrbitType | POLAR_OPERATIONAL_ENVIRONMENTAL_SATELLITE | The Polar-orbiting Operational Environmental Satellite (POES) project operates a constellation of weather satellites in polar orbits around the Earth. It is a joint effort between the National Oceanic and Atmospheric Administration (NOAA) and the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT). | - |
| CodeWeatherSatelliteOrbitType | GEOSTATIONARY_OPERATIONAL_ENVIRONMENTAL_SATELLITE | The Geostationary Operational Environmental Satellite system (GOES), operated by the United States' National Oceanic and Atmospheric Administration's National Environmental Satellite, Data, and Information Service division, supports weather forecasting, severe storm tracking, and meteorology research. | - |
| CodeWeatherSatelliteOrbitType | - | The type of weather satellite orbits. | - |
| CodeWeatherRadarType | TDWR_SYSTEM | Terminal Doppler Weather Radar (TDWR) is a Doppler weather radar system with a three-dimensional pencil beam" used primarily for the detection of hazardous wind shear conditions, precipitation, and winds aloft on and near major airports situated in climates with great exposure to thunderstorms in the United States." | - |
| CodeWeatherRadarType | NEXRAD_SYSTEM | NEXRAD (Next-Generation Radar) is a network of 159 high-resolution S-band Doppler weather radars | - |
| CodeWeatherRadarType | ASR_4 | A type of long-range surveillance radar. | - |
| CodeWeatherRadarType | - | The types of weather radar. | - |
| CodeWeatherPhenomenonType | TEMPERATURE_INVERSION | Vertical temperature distribution such that temperature increases with height. | - |
| CodeWeatherPhenomenonType | SQUALL | Atmospheric phenomenon characterized by an abrupt and large increase of wind speed with a duration of the order of minutes which diminishes rather suddenly. It is often accompanied by showers or thunderstorms. | - |
| CodeWeatherPhenomenonType | SANDSTORM | An ensemble of particles of sand energetically lifted to great heights by a strong and turbulent wind. | - |
| CodeWeatherPhenomenonType |