PREFIX rdf: <www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <www.w3.org/2000/01/rdf-schema#> PREFIX xsd: <www.w3.org/2001/XMLSchema#> PREFIX foaf: <xmlns.com/foaf/0.1/> PREFIX owl: <www.w3.org/2002/07/owl#> PREFIX dct: <purl.org/dc/terms/> PREFIX vs: <www.w3.org/2003/06/sw-vocab-status/ns#> PREFIX skos: <www.w3.org/2004/02/skos/core#> PREFIX vann: <purl.org/vocab/vann/> PREFIX dbo: <dbpedia.org/ontology/>