Service description
The YSA is a general thesaurus in Finnish which covers all fields of research and knowledge, which contains the most common terms and geographical names used in content description.
In 2019 YSA has been replaced by the General Finnish Ontology YSO and its extension for place names YSO places.
Joining the service
- Free of charge
Standards used
SFS 5471
Contact information
Service address
National Library
Background information
YSA has been used in databases since 1987.
Allärs is YSA's Swedish translation.
The General Finnish Ontology YSO has been developed on the basis of YSA.
Service users
- Enterprises
- Private individuals
- Organisations
The thesaurus has been used mainly by libraries, archives and museums.
Steering responsibility
The National Library of Finland
Organisation model
- Service is developed as part of basic operation of National Library