The semantic correspondence for each of the IWXXM message fields to the AIRM can be found on the following website:
https://airm.aero/developers/icao-wxxm-3.0.0-to-airm-1.0.0-index
AIRM Conformant
True
AIRM Correspondence
urn:aero:airm:1.0.0:ConceptualModel:Subjects:AirTrafficOperations:InformationServicesProducts:MeteorologicalInformationProduct:METAR
Datatype
IWXXM
Definition
The service offer meteorological information in accordance with ICAO Annex 3. The service offer meteorological information in accordance with the rules of latest applicable version of IWXXM. Note: the latest applicable version of IWXXM (IWXXM 2023-1) contains the METAR/SPECI schema version 3.1.0.
Reference
https://airm.aero/developers/icao-wxxm-3.0.0-to-airm-1.0.0-index