"GRDDL" . "MA" . "OWL" . "RDF" . "RDFa" . "RDFS" . "RIF" . "SKOS" . "SKOS-XL" . "WDR" . "VOID" . "WDRS" . "XHV" . "XML" . "XSD" . "CC" . "CTAG" . "DC" . "DCTERMS" . "FOAF" . "GR" . "ICAL" . "OG" . "REV" . "SIOC" . "V" . "VCARD" . "Schema" . "DescribedBy" . "License" . "Role" .