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         <gmd:maintenanceAndUpdateFrequency>
            <gmd:MD_MaintenanceFrequencyCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_MaintenanceFrequencyCode"
                                             codeListValue="weekly"/>
         </gmd:maintenanceAndUpdateFrequency>
      </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
</gmd:MD_Metadata>