Editing Geography Markup Language (section)

{{Short description|XML grammar for geographical features}}
{{Infobox file format
| name = Geography Markup Language
| screenshot = [[Image:Simple vector map.svg]]
| caption = A vector map, with points, polylines and polygons.
|_noextcode = on
| extension = {{code|.gml}} or {{code|.xml}}
| mime = application/gml+xml<ref>{{citation |url=http://portal.opengeospatial.org/files/?artifact_id=37743 |title=Technical Committee Policies and Procedures: MIME Media Types for GML |format=PDF |author=Open Geospatial Consortium Inc. |date= 2010-02-08}}</ref>
| type code = 
| uniform type = 
| magic = 
| owner = [[Open Geospatial Consortium]]
| creatorcode =
| released               = {{Start date|2000|df=yes}} <!-- {{Start date|YYYY|mm|dd|df=yes}} -->
| latest release version = 3.2.1<ref>{{cite web |url=http://www.opengeospatial.org/standards/gml |title=OpenGIS Geography Markup Language (GML) Encoding Standard |access-date=2011-03-25}}</ref>
| latest release date    = {{Start date and age|2007|08|27|df=yes}}<!-- {{Start date and age|YYYY|mm|dd|df=yes}} -->
| genre = [[Geographic Information System]]
| container for =
| contained by =
| extended from = [[XML]]
| extended to =
| standard = [http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=32554 ISO 19136:2007]
| free                   = 
| url                    = 
}}
The '''Geography Markup Language''' ('''GML''') 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.  Key to GML's utility is its ability to integrate all forms of geographic information, including not only conventional "vector" or discrete objects, but coverages (see also [[JPEG 2000#GML JP2 georeferencing|GMLJP2]]) and sensor data.