Service description

KOKO is a collection of Finnish ontologies, which have been linked to each other by means of mirroring. KOKO’s framework is the General Finnish Upper Ontology (YSO) to which a group of ontologies in special fields have been linked. KOKO contains in all over 47,000 concepts. Other ontologies included in KOKO are:

  • natural resource and environment ontology (AFO),
  • public administration ontology (JUHO),
  • fiction ontology (KAUNO),
  • linguistics ontology (KTO),
  • literary studies ontology (KITO),
  • cultural studies ontology (KULO),
  • business ontology LIITO,
  • museum ontology (MAO),
  • maritime ontology (MERO),
  • music ontology (MUSO),
  • arts and crafts ontology (TAO),
  • health and well-being ontology (TERO),
  • the Finnish Work Environment Fund ontology (TSR) and
  • photography ontology (VALO).

Finto service is responsible for the maintenance of YSO and updating it in the KOKO ontology as well as coordination of KOKO cooperation. An owner organisation has been appointed for each special field, which is responsible for the maintenance of the ontology in question. Under certain terms, it possible to include more special ontologies in KOKO, when needed.


Standards used

ISO 25964-1:2011 (Information and documentation - Thesauri and interoperability with other vocabularies – Part 1: Thesauri for information retrieval)

ISO 25964-2:2013 (Information and documentation – Thesauri and interoperability with other vocabularies – Part 2: Interoperability with other vocabularies)



Contact information
Service address
Background information

Together with the maintaining bodies of ontologies in the KOKO ontology, the Finto service has drawn up formal policies and recommendations for ontologies included in KOKO. Finto service organises open KOKO workshops, which discuss issues and news related to KOKO and decide on shared policies with regard to KOKO. The contents of past workshops are available in the Thesauri and ontologies customer wiki.

Service users
  • Organisations
Steering responsibility


Organisation model
  • Networking
Index terms: