What is SKOS?
The Simple Knowledge Organization System (SKOS) is an ontology for expressing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, glossaries, folksonomies, other types of controlled vocabularies. It provides a standard, low-cost way of migrating existing concept schemes to the Semantic Web, so that they can be used as-is for the development of lightweight Semantic Web applications. SKOS is increasingly seen as a bridging technology, providing the missing link between the rigorous logical formalism of ontology languages such as OWL and the chaotic, informal and weakly-structured world of social approaches to information management, as exemplified by social tagging applications.
