<xs:simpleType name="IntersectionPlaneEnumType"><xs:annotation><xs:documentation>(ISO specific) The IntersectionPlaneEnumType enumerates values that describe the how the intersection plane is derived.</xs:documentation></xs:annotation><xs:restriction base="xs:NMTOKEN"><xs:enumeration value="PARALLEL"/><xs:enumeration value="PERPENDICULAR"/><xs:enumeration value="INCLUDING"/></xs:restriction></xs:simpleType>