<gml:UnitDefinition xmlns:gml="http://www.opengis.net/gml/3.2" gml:id="mm" uuid="ee33348a-133c-451f-8f40-bda8bdbafee6">
  <gml:description>
    Millimeter
  </gml:description>
  <gml:descriptionReference/>
  <gml:identifier codeSpace="http://unitsofmeasure.org/ucum.html">
    mm
  </gml:identifier>
  <gml:name>
    Millimeter
  </gml:name>
  <gml:quantityType>
    Distance
  </gml:quantityType>
</gml:UnitDefinition>