====== 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 ([[https://wiki.d-nb.de/display/LDS/Dokumentation+des+Linked+Data+Services+der+DNB|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]] - [[http://ontorule-project.eu/parrot/parrot?documentUri=http%3A%2F%2Fwww.cerl.org%2Fnamespaces%2Fct.xml&mimetype=default&profile=technical&language=en&customizeCssUrl=|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 =====
{{etalab-logo-licence-ouverte---open-licence-4.png?39x49 }}The CERL Thesaurus data is available under the terms of [[http://www.etalab.gouv.fr/pages/licence-ouverte-open-licence-5899923.html|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 [[http://ddata.over-blog.com/xxxyyy/4/37/99/26/licence/Licence-Ouverte-Open-Licence.pdf|French]] or [[http://ddata.over-blog.com/xxxyyy/4/37/99/26/licence/Licence-Ouverte-Open-Licence-ENG.pdf|English]]