LocationIndicator
urn:aero:airm:1.0.0:ConceptualModel:Subjects:BaseInfrastructure:CommunicationInfrastructure:LocationIndicator
A four-letter code group formulated in accordance with rules prescribed by ICAO and assigned to the location of an aeronautical fixed station.
Source:
ICAO Annex 1,ICAO Annex 10,