Simple Knowledge Organization System
W3C standard for thesauri, classification schemes, taxonomies, and controlled vocabularies.
Visit WebsiteBrowse the class tree, filter it, and select any class to see its subtree.
When and where you'd use this ontology in practice.
Publish taxonomies as linked data
Migrate library thesauri to the web
Vocabulary management and alignment
Build faceted classification systems
W3C-Document-LicenseDerivative works may be distributed only as software, supporting materials or documentation — not as a standalone or competing technical specification.
Derived from SKOS, Copyright (c) 2009 World Wide Web Consortium. https://www.w3.org/Consortium/Legal/copyright-documents. Source: https://www.w3.org/TR/skos-reference/
Verified against the licence text on 2026-08-07.
Other ontologies in Web Standards.