Geography Markup Language GML

GML is an XML based encoding standard for geographic information developed by the OpenGIS Consortium. GML is well developed to describe geometries and geographical relations. The GML specification starts with an abstract feature model using an object oriented approach and ends with a set of XML schema specifications. An important characteristic of GML is that it provides a set of XML schemas that may be used to construct an application schema. The application schema declares the feature and property types of interest of a particular domain. GML is also known as ISO 19136.