OAPEN works with publishers to build a quality controlled collection of open access books and provides services for publishers, libraries, and research funders in the areas of dissemination, quality assurance, and digital preservation.

OAPEN operates three platforms, the OAPEN Library, the OAPEN Open Access Books Toolkit and - in partnership with OpenEdition - the Directory of Open Access Books (DOAB).

The OAPEN Library is set up to host and disseminate OA books. Usage of the collection is reported following COUNTER-conformant usage statistics.


We host books for publishers and a variety of partners.

  • OAPEN provides various means to aggregate publications, either through OAI harvesting, bulk upload using its FTP-service, or through a web based manual uploading system.

  • OAPEN can accommodate uploading through third parties (Bibliovault, Ingram/CoreSource, Code Mantra).


We provide freely available metadata feeds in various formats and work with intermediaries to optimise dissemination of the collection.

  • OAPEN provides daily metadata feeds in various formats (ONIX 3.0, MARCXML, CSV) for libraries and their service providers.
  • OAPEN works with the main library suppliers, such as ProQuest (Serial Solutions), ExLibris (Primo Central) and EBSCO Discovery Service. The publications are integrated in WorldCat (OCLC) and BASE; OAPEN acts as aggregator for Europeana.
  • Libraries and aggregators can also harvest the metadata using the OAI harvesting protocol.
  • is optimised for search engines (using the site map) and is indexed by Google Scholar.

How our metadata is used


We improve discovery in collaboration with DOAB.

In addition to the OAPEN Library, OAPEN also manages a dedicated discovery service for open access books in partnership with OpenEdition: the Directory of Open Access Books (DOAB). DOAB contains the metadata of open access books, uploaded by publishers. Books in the OAPEN Library are automatically listed in DOAB, provided they have an open content licence (such as a CC licence).

Metadata / support

We support and enhance metadata according to best practice guidelines.

  • OAPEN supports persistent identifiers for documents (DOI), authors (ORCID) and funders (FundRef).
  • OAPEN is an OpenAIRE compliant repository for deposits.
  • OAPEN provides services to assist with uploading and enhancing metadata and documents and conversion of classification schemes (BIC)


We provide regular usage reports based on the COUNTER standard.

OAPEN provides regular reports about publications, including COUNTER-conformant usage statistics (in collaboration with IRUS-UK).