Geographic Metadata XML (GMX) Schema is a component of the XML Schema Implementation of Geographic Information Metadata documented in ISO/TS 19139:2007. GMX includes all the definitions of http://www.isotc211.org/2005/gmx namespace. The root document of this namespace is the file gmx.xsd. This extendedTypes.xsd schema contains the XML definitions of FileName, Anchor and MimeFileType classes. These classes are fully described in 7.2 of ISO/TS 19139:2007.