Element must have content or one of the following attributes: nilReason, xlink:href or uuidref. '' is not an accepted value. gco:nilReason attribute may only contain: missing, inapplicable, template, unknown, or withheld for element: The presence of a dimension attribute implies the presence of the srsName attribute. The presence of an axisLabels attribute implies the presence of the srsName attribute. The presence of an uomLabels attribute implies the presence of the srsName attribute. The presence of an uomLabels attribute implies the presence of the axisLabels attribute and vice versa. Date format must be YYYY-MM-DD (10 characters) You must specify one or more of gmd:individualName, gmd:organisationName or gmd:positionName. If gmd:accessConstraints has a gmd:MD_RestrictionCode with a value of 'otherRestrictions' then gmd: otherConstraints must be documented. If gmd:useConstraints has a gmd:MD_RestrictionCode with a value of 'otherRestrictions' then gmd: otherConstraints must be documented. gmd:units is mandatory if gmd:maxValue or gmd:minValue are provided. If gmd:SourcExtent is not documented then gmd:description is mandatory. If gmd:source and gmd:processStep do not exist and gmd:DQ_Dataquality/gmd:scope/gmd:level = 'dataset' or 'series' then gmd:statement is mandatory. If gmd:statement and gmd:processStep are not documented under LI_LIneage then gmd:source is mandatory. If gmd:statement and gmd:source are not documented under LI_LIneage then gmd:processStep is mandatory. If gmd:level/gmd:MD_ScopeCode is = 'dataset' then gmd:report or gmd:lineage is mandatory. If gmd:MD_ScopeCode is not equal to 'dataset' or 'series' then gmd:levelDescription is mandatory. If gmd:density is provided then gmd:densityUnits is mandatory. You must provide either gmd:distributionFormat or gmd:distributorFormat. You must document at least one of the following under gmd:EX_Extent: gmd:description, gmd:geographicElement, or gmd:temporalElement. West Bounding Longitude must be -180 or greater West Bounding Longitude must be 180 or less eastBoundLongitude must be -180 or greater eastBoundLongitude must be -180 or greater southBoundLatitude must be -90 or greater southBoundLatitude must be 90 or less northBoundLatitude must be -90 or greater northBoundLatitude must be 90 or less If the metadata gmd:hierarchyLevel code = 'dataset' then you must document gmd:EX_GeographicBoundingBox or gmd:EX_GeographicDescription. If the metadata gmd:hierarchyLevel code = 'dataset' or 'series' then gmd:topicCategory is mandatory. Either gmd:aggregateDataSetName or gmd:aggregateDataSetIdentifier must be documented. gmd:language is required if it is not defined by encoding. If gmd:dataType notEqual 'codelist', 'enumeration' or 'codelistElement' then gmd:obligation is mandatory. If gmd:obligation = 'conditional' then gmd:condition is mandatory. If gmd:dataType = 'codelistElement' then gmd:domainCode is mandatory. If gmd:dataType is not equal to 'codelistElement' then gmd:shortName is mandatory. If gmd:checkPointAvailability = '1' or 'true' then gmd:checkPointDescription is mandatory.