Simple Knowledge Organisation System or SKOS is
- a family of specifications, intended to standardize expressing controlled vocabularies (eg. taxonomies, thesauri, ...) in RDF.
- developed and maintained the W3C Semantic Web Deployment Working Group (SWDWG)
- described in the SKOS reference (Last Call Working Draft, dated 29 Aug 2008)
- to become a W3C Recommendation in the near future.