Check for fileIdentifier Metadata record should have a fileIdentifier. Check the form of CodeLists ME: The codeListValue attribute must match the content of the codeList element Check the form of uuid attributes uuid attributes must be valid uuids Check the form of uuidref attributes uuidref attributes must be valid uuids Check onlineResources onlineResources should have a name onlineResources should have a description onlineResources should have a function Check xlink in gmx:Anchor is not a valid URL. Test Xlinks to Docucomp URL to component in Docucomp is not valid. It should look like: http://www.ngdc.noaa.gov/docucomp