Linked Data
The CERL Thesaurus is also available as Linked Data. The RDF output uses standard vocabulary wherever possible, mainly the RDA Vocabulary (http://rdvocab.info/), but also the Geonames Ontology (http://www.geonames.org/ontology/), the WGS Geo Positioning vocabulary (http://www.w3.org/2003/01/geo/wgs84_pos), the FOAF Relationship vocabulary (http://vocab.org/relationship/), the Vocabulary of the Gemeinsame Normdatei (Documentation) and the Europeana Data Model (EDM) (http://europeana.eu/terms/).
Those elements missing in the above vocabularies are defined by the CERL Thesaurus Vocabulary (http://www.cerl.org/namespaces/ct.xml - see here for a human readable documation (Parrot)).
CERL Thesaurus records are returned in RDF/XML if the HTTP-header Accept is set to application/rdf+xml.
Beacon Files
Beacon files that provide a mapping of IDs from external authority files to CERL Thesaurus URIs (see http://meta.wikimedia.org/wiki/Dynamic_links_to_external_resources) are available for the following files:
- GND (PND): http://documents.cerl.org/beacon/gnd.txt (14.5 MB)
Licence
The CERL Thesaurus data is available under the terms of Etalab's Open Licence, which can be considered equivalent to ODC-BY and CC-BY 2.0.
Please see here for the full legal text of the licence in French or English
