<xs:complexType name="OpeningPropertyType">
<xs:annotation>
<xs:documentation>Denotes the relation of an _BondarySurface to its openings (doors, windows). The OpeningPropertyType
element must either carry a reference to an _Opening object or contain an _Opening object inline, but neither both nor
none.</xs:documentation>
</xs:annotation>
<xs:sequence minOccurs="0">
<xs:element ref="_Opening"/>
</xs:sequence>
<xs:attributeGroup ref="gml:AssociationAttributeGroup"/>
</xs:complexType>