ifc:IfcTankTypeEnum

<xs:simpleType name="IfcTankTypeEnum">
  <xs:restriction base="xs:string">
    <xs:enumeration value="basin"/>
    <xs:enumeration value="breakpressure"/>
    <xs:enumeration value="expansion"/>
    <xs:enumeration value="feedandexpansion"/>
    <xs:enumeration value="pressurevessel"/>
    <xs:enumeration value="storage"/>
    <xs:enumeration value="vessel"/>
    <xs:enumeration value="userdefined"/>
    <xs:enumeration value="notdefined"/>
  </xs:restriction>
</xs:simpleType>