ifc:IfcExternalSpatialElementTypeEnum

<xs:simpleType name="IfcExternalSpatialElementTypeEnum">
  <xs:restriction base="xs:string">
    <xs:enumeration value="external"/>
    <xs:enumeration value="external_earth"/>
    <xs:enumeration value="external_water"/>
    <xs:enumeration value="external_fire"/>
    <xs:enumeration value="userdefined"/>
    <xs:enumeration value="notdefiend"/>
  </xs:restriction>
</xs:simpleType>