<xs:simpleType name="measureUnitsType">
  <xs:annotation>
    <xs:documentation>The type of value (can be distance, angle, scale, temperature, pressure)</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:NMTOKEN">
    <xs:enumeration value="distance"/>
    <xs:enumeration value="angle"/>
    <xs:enumeration value="scale"/>
    <xs:enumeration value="temperature"/>
    <xs:enumeration value="pressure"/>
  </xs:restriction>
</xs:simpleType>