<xs:simpleType name="MD_TopicCategoryCode_Type">
  <xs:annotation>
    <xs:documentation>High-level geospatial data thematic classification to assist in the grouping and search of available geospatial datasets</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:string">
    <xs:enumeration value="farming"/>
    <xs:enumeration value="biota"/>
    <xs:enumeration value="boundaries"/>
    <xs:enumeration value="climatologyMeteorologyAtmosphere"/>
    <xs:enumeration value="economy"/>
    <xs:enumeration value="elevation"/>
    <xs:enumeration value="environment"/>
    <xs:enumeration value="geoscientificInformation"/>
    <xs:enumeration value="health"/>
    <xs:enumeration value="imageryBaseMapsEarthCover"/>
    <xs:enumeration value="intelligenceMilitary"/>
    <xs:enumeration value="inlandWaters"/>
    <xs:enumeration value="location"/>
    <xs:enumeration value="oceans"/>
    <xs:enumeration value="planningCadastre"/>
    <xs:enumeration value="society"/>
    <xs:enumeration value="structure"/>
    <xs:enumeration value="transportation"/>
    <xs:enumeration value="utilitiesCommunication"/>
  </xs:restriction>
</xs:simpleType>