ifc:IfcWorkCalendarTypeEnum

<xs:simpleType name="IfcWorkCalendarTypeEnum">
  <xs:restriction base="xs:string">
    <xs:enumeration value="firstshift"/>
    <xs:enumeration value="secondshift"/>
    <xs:enumeration value="thirdshift"/>
    <xs:enumeration value="userdefined"/>
    <xs:enumeration value="notdefined"/>
  </xs:restriction>
</xs:simpleType>