20260318-0 GML GML 2012-09-01 2025-02-11 2000-05-01 GML 2014-03-12 2014-02-19 Geography Markup Language GML – Geography Markup Language – is the XML grammar defined by the Open Geospatial Consortium (OGC) to express geographical features. GML serves as a modeling language for geographic systems as well as an open interchange format for geographic transactions on the Internet. .gml .xml application/gml+xml GML false GML 2000-05-01 GML true true https://www.iana.org/assignments/media-types/application/gml+xml