# Core W3C ontologies (OWL 2 reserved vocabulary)
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix owl: <http://www.w3.org/2002/07/owl#>
prefix xsd: <http://www.w3.org/2001/XMLSchema#>
# Other ontologies
prefix acl: <http://www.w3.org/ns/auth/acl#>
prefix cc: <http://creativecommons.org/ns#>
prefix cert: <http://www.w3.org/ns/auth/cert#>
prefix csvw: <http://www.w3.org/ns/csvw#>
prefix dc: <http://purl.org/dc/terms/>
prefix dcam: <http://purl.org/dc/dcam/>
prefix dcat: <http://www.w3.org/ns/dcat#>
prefix dctype: <http://purl.org/dc/dcmitype/>
prefix foaf: <http://xmlns.com/foaf/0.1/>
prefix ldp: <http://www.w3.org/ns/ldp#>
prefix posixstat: <http://www.w3.org/ns/posix/stat#>
prefix schema: <https://schema.org/>
prefix shacl: <http://www.w3.org/ns/shacl#>
prefix skos: <http://www.w3.org/2004/02/skos/core#>
prefix skosxl: <http://www.w3.org/2008/05/skos-xl#>
prefix solidterms: <http://www.w3.org/ns/solid/terms#>
prefix swapdoc: <http://www.w3.org/2000/10/swap/pim/doc#>
prefix ui: <http://www.w3.org/ns/ui#>
prefix vann: <http://purl.org/vocab/vann/>
prefix vcard: <http://www.w3.org/2006/vcard/ns#>
prefix ws: <http://www.w3.org/ns/pim/space#>Check prefix.cc for an idea of commonly used prefix popularity.