The Finnish Interoperability Platform (Yhteentoimivuusalusta) is a national digital service maintained by the Digital and Population Data Services Agency (DVV, Digi- ja väestötietovirasto) of Finland. It provides a set of integrated, freely accessible tools designed to support the creation, publication, maintenance, and reuse of interoperable data content across public administration and the private sector.

The platform consists of three integrated tools:

1. Terminologies Tool (sanastot.suomi.fi) A publication and maintenance application for terminology glossaries. Supports the creation and management of specialised concept definitions, terms, and relationships between concepts. Aligns with the Nordic vocabulary specification and the Finnish public administration terminology development process (JHS 175). Used by glossary specialists, data architects, IT experts, communications professionals, and citizens seeking clarity on administrative concepts.

2. Reference Data Tool (koodistot.suomi.fi) A nationwide shared service for publishing and maintaining code sets and classifications. Supports hierarchical code sets, code set extensions, variants, and versioning. Code sets can be consumed manually or via programmatic interfaces. Used by all organisations that maintain or use shared code sets, ensuring everyone always accesses the same up-to-date version.

3. Data Vocabularies Tool (tietomallit.suomi.fi) A publication and maintenance service for semantic data models (core vocabularies and application profiles). Supports the description of classes, attributes, and associations between classifications. Primarily used for logical data modelling and for describing the data content of interfaces and data repositories. Relies on and links to content from the Terminologies and Reference Data tools.

It is released under the European Union Public Licence (EUPL).