<xs:simpleType name="LogarithmicPowerRatioPerLengthUom">
  <xs:restriction base="eml:UomEnum">
    <xs:enumeration value="B/m">
      <xs:annotation>
        <xs:documentation>bel per metre</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="dB/ft">
      <xs:annotation>
        <xs:documentation>decibel per foot</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="dB/km">
      <xs:annotation>
        <xs:documentation>decibel per kilometre</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="dB/m">
      <xs:annotation>
        <xs:documentation>decibel per metre</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>