http://www.tc211.org/ISO19139/resources/codeList.xml#MD_MaintenanceFrequencyCode No changes or updates will be made to this version notPlanned 011 notPlanned unknown: http://www.tc211.org/ISO19139/resources/codeList.xml#MD_MaintenanceFrequencyCode No changes or updates will be made to this version notPlanned 011 notPlanned unknown: