<complexType name="TopoSurfaceType">
<annotation>
<documentation>The TopoSurface type and element represent a homogeneous topological expression, a set of directed faces, which if realised are isomorphic to a geometric surface primitive. The intended use of TopoSurface is to appear within a surface feature instance to express the structural and possibly geometric relationships of this surface to other features via the shared face definitions.</documentation>
</annotation>
<complexContent>
<extension base="gml:AbstractTopologyType">
<sequence>
<element ref="gml:directedFace" maxOccurs="unbounded" />
</sequence>
</extension>
</complexContent>
</complexType>
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