  <gmd:MD_SecurityConstraints xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gmi="http://www.isotc211.org/2005/gmi" xmlns:gco="http://www.isotc211.org/2005/gco" uuid="5564e942-37db-4b46-9802-0fa92fd3e612">
    <gmd:classification>
      <gmd:MD_ClassificationCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ClassificationCode" codeListValue="unclassified" codeSpace="001"/>
    </gmd:classification>
    <gmd:userNote>
      <gco:CharacterString>
        security clearance not required
      </gco:CharacterString>
    </gmd:userNote>
    <gmd:classificationSystem>
      <gco:CharacterString>
        none
      </gco:CharacterString>
    </gmd:classificationSystem>
  </gmd:MD_SecurityConstraints>