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The Basic Register of Thesauri, Ontologies & Classifications (BARTOC) is a database of Knowledge Organization Systems. Its main goal is to document knowledge organization systems (KOS), such as classifications, thesauri and authority files, at one place, in order to achieve greater visibility, highlight their features, make them searchable and comparable, and foster knowledge sharing. In contrast to other terminology registries, BARTOC includes any kind of KOS from any subject area, in any language, any publication format, and any form of accessibility. In addition, it manages a list of other terminology registries.[1]

The creation of BARTOC was motivated by the need to create a bibliography, and teaching information literacy.[2] Since its launch in November 2013, BARTOC has collected information about more than 5,000 terminologies and almost 100 terminology registries until November 2020. A comparative study of terminology types and registries confirmed BARTOC to contain "a relatively sufficient amount of metadata".[3] Its content is available as public domain with the Public Domain Dedication and License (PDDL).

A circle of international editors has gathered around BARTOC from twelve countries all across Europe.[4] BARTOC has been approved by the International Society for Knowledge Organization.

In November 2020 the implementation of BARTOC was moved from Drupal at the University Library of Basel to a new technical infrastructure developed with project coli-conc.[5][2] Since then, BARTOC is hosted at the Common Library Network (GBV) in Göttingen.


  1. ^ BARTOC terminology registries
  2. ^ a b Ledl, Andreas Ledl; Jakob, Voß (May 2016). "Describing Knowledge Organization Systems in BARTOC and JSKOS". proceedings of TKE 2016. Copenhagen. hdl:10760/29366.
  3. ^ Bratková, Eva; Kučerová, Helena (2014). "Knowledge Organization Systems and Their Typology". Revue of Librarianship. 25 (2): 1–25. Archived from the original on 2016-08-08.
  4. ^ BARTOC Contact
  5. ^ coli-conc homepage

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