<xs:complexType name="IfcSpaceBaseQuantityType">
    <xs:complexContent>
      <xs:extension base="uro:IfcAttributeType">
        <xs:sequence>
          <xs:element name="nominalHeight" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="clearHeight" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="finishCeilingHeight" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="grossPerimeter" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="netPerimeter" minOccurs="0" type="gml:LengthType"/>
          <xs:element name="grossCeilingArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="grossFloorArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netCeilingArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netFloorArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="grossWallArea" minOccurs="0" type="gml:MeasureType"/>
          <xs:element name="netWallArea" 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>