<xs:simpleType name="ReciprocalVolumeUom">
  <xs:restriction base="eml:UomEnum">
    <xs:enumeration value="1/bbl">
      <xs:annotation>
        <xs:documentation>per barrel</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="1/ft3">
      <xs:annotation>
        <xs:documentation>per cubic foot</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="1/gal[UK]">
      <xs:annotation>
        <xs:documentation>per UK gallon</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="1/gal[US]">
      <xs:annotation>
        <xs:documentation>per US gallon</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="1/L">
      <xs:annotation>
        <xs:documentation>per litre</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="1/m3">
      <xs:annotation>
        <xs:documentation>per cubic metre</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>