<xs:complexType name="GroundSurfaceType">
	<xs:annotation>
		<xs:documentation>Horizontal construction that separates the interior part of the Tunnel from the ambient medium (rock,
			earth, water, air, ..) from below on the lowest level. </xs:documentation>
	</xs:annotation>
	<xs:complexContent>
		<xs:extension base="AbstractBoundarySurfaceType">
			<xs:sequence>
				<xs:element ref="_GenericApplicationPropertyOfGroundSurface" minOccurs="0" maxOccurs="unbounded"/>
			</xs:sequence>
		</xs:extension>
	</xs:complexContent>
</xs:complexType>