ifc:IfcDamperTypeEnum

<xs:simpleType name="IfcDamperTypeEnum">
  <xs:restriction base="xs:string">
    <xs:enumeration value="backdraftdamper"/>
    <xs:enumeration value="balancingdamper"/>
    <xs:enumeration value="blastdamper"/>
    <xs:enumeration value="controldamper"/>
    <xs:enumeration value="firedamper"/>
    <xs:enumeration value="firesmokedamper"/>
    <xs:enumeration value="fumehoodexhaust"/>
    <xs:enumeration value="gravitydamper"/>
    <xs:enumeration value="gravityreliefdamper"/>
    <xs:enumeration value="reliefdamper"/>
    <xs:enumeration value="smokedamper"/>
    <xs:enumeration value="userdefined"/>
    <xs:enumeration value="notdefined"/>
  </xs:restriction>
</xs:simpleType>