<xs:complexType name="InteriorHollowSpacePropertyType">
<xs:annotation>
<xs:documentation>Denotes the relation of a Tunnel to its internal holllow spaces. The InteriorHollowSpacePropertyType
element must either carry a reference to a HollowSpace object or contain a HollowSpace object inline, but neither both nor
none. </xs:documentation>
</xs:annotation>
<xs:sequence minOccurs="0">
<xs:element ref="HollowSpace"/>
</xs:sequence>
<xs:attributeGroup ref="gml:AssociationAttributeGroup"/>
</xs:complexType>