The National Digital Library project has ended and this website will no longer be updated. You will find information about digital cultural heritage services, projects and future collaboration on the Digime website,

Venäläiset topografikartat. Vuoden 1874 mukaan. Kansallisarkisto

The NDL's Enterprise Architecture focuses on identifying the impact of the digitalization of society and describing its effects on operating models and mechanisms for processing cultural heritage. In particular, this will be reflected in the National Architecture for Digital Services becoming one of the key themes in the NDL's enterprise architecture. Now is available the third generation of the architecture which emphasis need for long-term process to build sustainable and interoperable enterprise architecture.

The Standard Portfolio defines standards for the NDL. These standards create foundation for interoperability and for service development in NDL.  In addition to specifying standards, it provides short justifications for the selections. More detailed instructions for the implementation of standards are produced separately. In some cases, a reference to an existing international instruction (profile) is enough, but some national instructions are also necessary.

Also three specifications related to digital preservation service (DP service) are published. These specifications define in detail how standards from the Standard Portfolio should be utilized.

Firstly, the Metadata Requirements and Preparing Content for Digital Preservation describes how digital assets should be aggregated for preservation and how to transfer them to preservation service. It specifies the metadata requirements, the structure of the submission and dissemination information packages and their METS profile of the DP service of the NDL.

Secondly, the File Formats specification specifies the file formats in which the NDL’s DP service preserves and receives digital assets. The DP service supports two kinds of file formats: Recommended and acceptable for transfer. Recommended file formats are those that the NDL project considers to be usable for a long time, whereas acceptable for transfer formats are those in which a significant amount of content is currently stored in partner organizations. Specification also includes criteria for selecting suitable preservation file formats.

Thirdly, the Digital Preservation Service Interfaces defines the interfaces of the NDL’s DP service. Partner organizations can utilize these interfaces for example for ingesting content into the preservation service or retrieve content from there. The main purpose of these interfaces is to enable machine-to-machine communication. The interfaces are designed to be as simple as possible, but the model is also scalable and new features can be added to interfaces later.

These specifications will be updated by needs of national memory organisations.