BuildingBlock
European Supplement
urn:aero:ses:eurocontrol:airm:1.0.0:ConceptualModel:Subjects:AirspaceInfrastructure:Airspace:BuildingBlock
Elementary sections of modularised airspace (as defined by the appropriate airspace provider) that are too small individually for controlling purposes, but instead form the basic constituent parts of a controlling block as part of an optimising process.