Interfaces that provide access to our data

Linked Data

Linked Data is is a method of publishing structured data so that it can be interlinked and accessed by both humans and machines.


The Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) is a protocol for harvesting metadata descriptions of records in a repository. We provide OAI-PMH access to several document and metadata repositories.

  • Digi OAI-PMHAccess to digitized newspaper and journal collections via OAI-PMH.
  • Doria OAI-PMHAccess to collections in the Doria open repository via OAI-PMH.
  • Fenno-Ugrica OAI-PMHAccess to collections in the Fenno-Ugrica open repository via OAI-PMH.
  • Fragmenta OAI-PMHAccess to collections in the Fragmenta Membranea open repository via OAI-PMH.
  • Melinda OAI-PMHAccess to the Melinda shared metadata repository / union catalog via OAI-PMH.


OpenSearch is a collection of simple formats for the sharing of search results. An OpenSearch description document can be used to describe a search engine so that it can be used by search client applications.

  • DSpace OpenSearchAccess to many DSpace based open repositories via OpenSearch API.


OpenURL is a format for encoding a description of a resource within a URL, intended to help Internet users to find a copy of the resource that they are allowed to access.

  • Digi OpenURLAccess to digitized newspaper collections via OpenURL.


REST (Representational State Transfer) is an API implementation style that provides web services using the HTTP protocol.

  • DIGI DAM REST APIAccess to the search result metadata of DAM-API
  • Finna REST APIAccess to the index of the discovery system via REST API.
  • Finto REST APIAccess to the vocabularies of the Finto thesaurus and ontology service via REST API.
  • ISIL REST APIAccess to the ISIL identifiers of Finnish libraries via REST API.

Z39.50 and SRU

Z39.50 is a client-server communications protocol for searching and retrieving information from a database. It is supported by many integrated library systems. SRU (Search and Retrieve via URL) is a successor protocol that is based on HTTP but provides the same facilities for searching.

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