<xs:complexType name="BuildingPartPropertyType">
	<xs:annotation>
		<xs:documentation>Denotes the relation of an _AbstractBuilding to its building parts. The BuildingPartPropertyType element
			must either carry a reference to a BuildingPart object or contain a BuildingPart object inline, but neither both nor
			none.</xs:documentation>
	</xs:annotation>
	<xs:sequence minOccurs="0">
		<xs:element ref="BuildingPart"/>
	</xs:sequence>
	<xs:attributeGroup ref="gml:AssociationAttributeGroup"/>
</xs:complexType>