@prefix dct: . @prefix ns1: . @prefix ns2: . @prefix ns3: . @prefix ns4: . @prefix rdfs: . @prefix skos: . a skos:Concept ; ns3:creator "GML SWG" ; ns3:date "2010-03-23" ; ns3:source "OGC 07-036 Clause 8.2.3" ; dct:created "2010-03-23" ; dct:modified "2012-02-14" ; ns1:hasProfile ; ns4:status ; rdfs:seeAlso , ; ns2:sameAs ; skos:altLabel "Unknown" ; skos:definition "The correct value is not known to, or not computable by, the sender of this data. However, the correct value probably exists"@en ; skos:exactMatch ; skos:prefLabel "Unknown"@en .