ifc:IfcValveTypeEnum

<xs:simpleType name="IfcValveTypeEnum">
  <xs:restriction base="xs:string">
    <xs:enumeration value="airrelease"/>
    <xs:enumeration value="antivacuum"/>
    <xs:enumeration value="changeover"/>
    <xs:enumeration value="check"/>
    <xs:enumeration value="commissioning"/>
    <xs:enumeration value="diverting"/>
    <xs:enumeration value="drawoffcock"/>
    <xs:enumeration value="doublecheck"/>
    <xs:enumeration value="doubleregulating"/>
    <xs:enumeration value="faucet"/>
    <xs:enumeration value="flushing"/>
    <xs:enumeration value="gascock"/>
    <xs:enumeration value="gastap"/>
    <xs:enumeration value="isolating"/>
    <xs:enumeration value="mixing"/>
    <xs:enumeration value="pressurereducing"/>
    <xs:enumeration value="pressurerelief"/>
    <xs:enumeration value="regulating"/>
    <xs:enumeration value="safetycutoff"/>
    <xs:enumeration value="steamtrap"/>
    <xs:enumeration value="stopcock"/>
    <xs:enumeration value="userdefined"/>
    <xs:enumeration value="notdefined"/>
  </xs:restriction>
</xs:simpleType>