The National Library of Finland maintains and develops services to facilitate the data description of libraries.

The National Library of Finland offers training and guidance in the use of various formats such as MARC 21, ONIX and Dublin Core and maintains the Finnish instructions of these formats.

The National Library of Finland also maintains subject indexes, ontologies and other glossaries that help with the subject indexing of the materials and facilitate information search.

The description standard service gives instructions on how the rules are applied to the description of library materials. The description standards applied in Finland are RDA and ISBD.

The purpose of the international ISIL standard identifier systemis to determine and promote the use of standard identifiers in order to recognise libraries and similar organisations in an unambiguous and machine-readable manner. In Finland, the National Library of Finland is in charge of distributing the standard identifiers.