<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold"> GML: Geographic Markup Language </hi> (2012) – Extended schemas and encoding rules. Version 3.3.0 (eds.) OGC <ref xmlns="http://www.tei-c.org/ns/1.0" target="https://www.opengeospatial.org/standards/gml">https://www.opengeospatial.org/standards/gml</ref>