AIXM used by aviation technology http://aixm.aero/
AIXM Documentation http://aixm.aero/sites/aixm.aero/files/imce/AIXM51HTML/index.html
AIXM 5.1 XSD Schema http://aixm.aero/document/aixm-51-xml-schema-xsd
AIXM 5.1 validator https://swim.m-click.aero/validator/
AIXM 5.1 definition https://ext.eurocontrol.int/aixmwiki_public/bin/view/Main/XML_Tags#H5BLive5DEuropeanAISDatabase28EAD29
AIXM Github https://github.com/aixm