<xs:complexType name="WallSurfaceType">
<xs:annotation>
<xs:documentation>Mainly vertical construction that separates the interior part of the Tunnel from the ambient medium (rock,
earth, water, air, ..)</xs:documentation>
</xs:annotation>
<xs:complexContent>
<xs:extension base="AbstractBoundarySurfaceType">
<xs:sequence>
<xs:element ref="_GenericApplicationPropertyOfWallSurface" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>