Open Access and Open Access categories

Bild: Open Access Logo

Not all Open Access is the same.

People often talk about Green or Golden Open Access, but other category names are also increasingly used.

The following explanation shows how the terms are used in the University Bibliography (the central publication directory of the UDE) and DuEPublico (the institutional full-text repository of the UDE) and what exactly they mean.

Open Access (OA):

The term itself can also already be interpreted in different ways. In the literal sense, "Open Access" means first of all "free access", in our context to publications.

This understanding of Open Access does not necessarily imply that the publications may also be passed on or modified.

DuEPublico, for example, is an Open Access repository where it is also possible to publish publications in this sense (e.g. as "All rights reserved").

Another definition of OA is provided by the Berlin Declaration, see the following section.

Open Access in the meaning of the Berlin Declaration:

A broad scientific community has agreed in principle on an understanding of OA in accordance with the "Berlin Declaration on Open Access to Knowledge in the Sciences and Humanities".

In this sense, authors allow users to "copy, use, distribute, transmit and publicly display OA publications, and to make and distribute adaptations thereof, provided that the authorship is correctly acknowledged". The Berlin Declaration thus goes a clear step beyond mere free availability in the literal sense mentioned above.

The UDE signed the Berlin Declaration in 2014. The possibility of granting certain Creative Commons licences (CC BY and CC BY-SA) in DuEPublico reflects this understanding of Open Access.

We distinguish the following OA categories:

Grafik: Open Access Gold

The Open Access movement

Publications in Open Access Gold appear directly in the public domain, usually under an open content licence, for example a Creative Commons licence:

  •     As an article in a journal that publishes OA articles exclusively.
  •     As a collective work or as part of a collective work that is fully accessible in OA
  •     As an OA monograph


Open Access Platinum refers to a "sub-category" of OA Gold.

While OA Gold publications are subject to publication fees, so-called APC (Article Processing Charges), OA Platinum publications are free of charge for authors.

Grafik: Open Access Hybrid

DFG guidelines

Open Access Hybrid refers to articles that appear OA in a journal or collective work in which not all articles are published OA as a matter of principle. The term "OA Hybrid" for the articles is derived from the fact that different access options can exist in the journal for different articles: "Closed Access" and "Open Access".

Note: The term "hybrid" is also used in the context of publications with another meaning: the parallel publication of books in printed and digital form. However, parallel publication is not relevant for classification in OA categories.

Grafik: Open Access Grün

UDE initiative

Open Access Green refers to the OA secondary publication of a publication on a repository/document server or website that was not published OA as a first publication.
As a special feature compared to publications in other categories, OA green publications can also be in a form other than the original (for example, publication as a pre- or postprint or Authors Accepted Manuscript (AAM)).
At UDE, DuEPublico as an institutional repository offers the possibility of publishing as OA Green.

Grafik: Open Access Embargo

Open Access Embargo includes publications that were previously only accessible for a fee. These are made freely available by publishers after a certain period of time.

Grafik: Open Access Bronze

Open access bronze refers to individual articles that are freely accessible within fee-based publications but do not have an open content licence. This is the decision of the individual publisher and permanent and reliable free access is not guaranteed. In this respect, these publications do not meet the generally applicable requirements for Open Access publications.

Please note:
All contents on these pages are for information purposes only and are not legally binding.