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