AIXM 4.5
AIXM 4.5 was published in 2005, as an update of an earlier AIXM 3.3 version, which was originally developed by Eurocontrol for the needs of the European AIS Database (EAD) project. It comprises an entity-relationship data model (called "AICM") and an XML Schema.
AIXM 4.5 is still in use in many systems around the world, in particular for the coding of a subset of the static aeronautical data.