<xs:complexType name="IfcWallType">
    <xs:complexContent>
      <xs:extension base="uro:IfcBuildingElementType">
        <xs:sequence>
          <xs:element name="nominalLength" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="nominalWidth" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="nominalHeight" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="grossFootPrintArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netFootPrintArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="grossSideArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netSideArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="grossSideAreaLeft" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netSideAreaLeft" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="grossSideAreaRight" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netSideAreaRight" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="grossVolume" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netVolume" minOccurs="0" type="gml:MeasureType"/>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>