When it comes to measuring the quality of an open access repository,
it is not the size that matters but the sum of its characteristics.



The Open Access Repository Ranking (OARR) ranks open access repositories from Germany, Austria and Switzerland. The ranking is based on an open and transparent metric that was developed in accordance with the open access community. This metric is a synthesis of different schemes and studies that surveyed and describe open access repositories. OARR tries to keep track of ever-changing technical and political developments in the sphere of open access with a metric that is updated iteratively.


For years we have been enthusiastically building institutional and disciplinary open access publication repositories as well as research data repositories. We and many other repository managers and developers try our best to make green open access convenient and sustainable at the same time. Some institutions have succeeded in doing so, others still need help. Due to this need the widely acknowledged DINI Certificate was established in 2004. OARR shall complement the DINI Certificate and motivate repository operators to improve their service. We truly believe that a ranking is the best way to credit the effort of our colleagues: To make them visible as role models and best practice. Unlike other rankings OARR does not focus on SEO and the size of an open access repository. Instead, OARR spotlights attributes each open access repository should have in order to provide the best possible service to its users.


The ranking is published annually at the Open-Access-Tage conference in September. The preceding January each open access repository listed in BASE that meets the OARR definition will be included in the new ranking. The respective repository managers will be contacted later on to submit their data via an online form. This procedure is supposed to minimize the amount of potential errors in indexing by asking the respective repository managers as the most reliable source of information. All fields that are left blank will be counted as not existent resulting in a score of 0 for the respective criterion. The OARR team reviews all submissions assuring the quality and validity.

For whom?

OARR aims primarily at repository managers and institutions that host, run or plan to build a repository. OARR gives funders and repository managers get an overview of the (technical) developments within the open access repository community. Finally, OARR enables researchers to identify the open access repository that best suits their needs when looking for a proper place to deposit publications.

Where to?

For now OARR is a ranking limited to Germany, Austria and Switzerland. We are planning to extend it to other countries. However, this depends very much on the feedback of professionals from as many countries as possible to make the OARR metric a reliable and truly bottom up global benchmark for open access repositories. It is not clear yet whether the ranking should grow country by country or right to global scale but we are open for your ideas. OARR is a research project initiated at the Berlin School of Library and Information Science of the Humboldt-Universität zu Berlin. Currently, OARR is a pro bono project. If you have any ideas (e. g. cooperation or metric improvements) on how to take OARR to the next level we encourage you to contact us.

Any questions?

If you have any questions that have not been addressed here or in the FAQ do not hesitate to contact us. If you have suggestions on how to improve our website or the metric please let us know about it.