<complexType name="OrientableSurfaceType">
	<annotation>
		<documentation>OrientableSurface consists of a surface and an orientation. If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface".</documentation>
	</annotation>
	<complexContent>
		<extension base="gml:AbstractSurfaceType">
			<sequence>
				<element ref="gml:baseSurface">
					<annotation>
						<documentation>References or contains the base surface (positive orientation).</documentation>
					</annotation>
				</element>
			</sequence>
			<attribute name="orientation" type="gml:SignType" default="+">
				<annotation>
					<documentation>If the orientation is "+", then the OrientableSurface is identical to the baseSurface. If the orientation is "-", then the OrientableSurface is a reference to a Surface with an up-normal that reverses the direction for this OrientableSurface, the sense of "the top of the surface". "+" is the default value.</documentation>
				</annotation>
			</attribute>
		</extension>
	</complexContent>
</complexType>