ONKI ontology library service contains ontologies (including vocabularies and thesauri) used in Finnish on a national level, and services for creating, publishing, and using them cost-efficiently. Ontologies are conceptual models, that identifies the concepts of a domain and contain machine "understandable" descriptions of the relations between the concepts. Ontologies can be used e.g. for describing content in a more specific and consistent way, which makes it possible to create more intelligent applications, such as MuseumFinland, HealthFinland and CultureSampo, based on such precise knowledge.
Common Tag is an open tagging format developed to make content more connected, discoverable and engaging. Unlike free-text tags, Common Tags are references to unique, well-defined concepts, complete with metadata and their own URLs. With Common Tag, site owners can more easily create topic hubs, cross-promote their content, and enrich their pages with free data, images and widgets.
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