<xs:simpleType name="PressurePerPressureUom">
  <xs:restriction base="eml:UomEnum">
    <xs:enumeration value="atm/atm">
      <xs:annotation>
        <xs:documentation>standard atmosphere per standard atmosphere</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="bar/bar">
      <xs:annotation>
        <xs:documentation>bar per bar</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="Euc">
      <xs:annotation>
        <xs:documentation>euclid</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="kPa/kPa">
      <xs:annotation>
        <xs:documentation>kilopascal per kilopascal</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="MPa/MPa">
      <xs:annotation>
        <xs:documentation>megapascal per megapascal</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="Pa/Pa">
      <xs:annotation>
        <xs:documentation>pascal per pascal</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="psi/psi">
      <xs:annotation>
        <xs:documentation>psi per psi</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>