<xs:simpleType name="MassLengthUom">
  <xs:restriction base="eml:UomEnum">
    <xs:enumeration value="kg.m">
      <xs:annotation>
        <xs:documentation>kilogram metre</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="lbm.ft">
      <xs:annotation>
        <xs:documentation>pound-mass foot</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>