<element name="exterior" type="gml:AbstractRingPropertyType">
<annotation>
<appinfo source="urn:opengis:specification:gml:schema-xsd:geometryBasic2d:3.1.1">geometryBasic2d.xsd</appinfo>
<documentation>A boundary of a surface consists of a number of rings. In the normal 2D case, one of these rings is distinguished as being the exterior boundary. In a general manifold this is not always possible, in which case all boundaries shall be listed as interior boundaries, and the exterior will be empty.</documentation>
</annotation>
</element>
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