<element name="_GeometricPrimitive" type="gml:AbstractGeometricPrimitiveType" abstract="true" substitutionGroup="gml:_Geometry">
	<annotation>
		<documentation>The "_GeometricPrimitive" element is the abstract head of the substituition group for all (pre- and user-defined) 
		geometric primitives.</documentation>
	</annotation>
</element>