Source: Routes to publishing openly. The Turing Way Community. This illustration is created by Scriberia with The Turing Way community, used under a CC-BY 4.0 licence. DOI: 10.5281/zenodo.3332807

There are different pathways to making your publications openly accessible:

Repository-based or Green Open Access

Green Open Access is when a version of a published work (preprint, postprint, publisher’s version) is deposited into a repository where it can be accessed for free. The repository can be an institutional repository such as Recercat. The repository allows search engines such as Google to crawl their content so that the deposited articles are accessible on the Internet. These articles may have a Creative Commons License applied, which specifies how the article can be used.

Some publishers may require some months embargo, before the article can be made available in the open repository. Information regarding the self-archiving policies of publishers can be found by searching at the Sherpa/Romeo website or publishers’ websites directly.


It is the draft of the manuscript before formal peer-review, or the first version sent to the journal for consideration.


It is the version of the manuscript after formal peer-review, with changes made, but before being type-set by the publisher.

Publisher’s version

It is the version of the manuscript published in a journal with the journal's type-set and branding.

Journal-based or Gold Open Access

Gold Open Access refers to publishing in a fully open access scholarly journal, where the publisher provides free and immediate online access to the full content of the journal and the final published articles are fully open access. Articles have a Creative Commons License applied, which specifies how the article can be used.

Business models for this form of open access vary. Publishers often charge an article processing charge (APC), which may be paid by the funder, author’s institution, or an individual researcher.

Diamond Open Access

Diamond Open Access refers to open access journals that are free for readers to access and for authors to publish in. These journals are often community-driven and supported by institutions or by national or regional infrastructure.

Choose the right Open Access publisher

Think Check Submit

A checklist to help you choose a trusted journal and publisher for your research.

Directory of Open Access Journals (DOAJ)

Check that a journal meets standards. DOAJ provides and maintains a list of quality, peer-reviewed journal titles.



For more information and assistance, contact Documentation Centre and Library.


Open Science & Research Services: Open Access (Nanyang Technological University)

Last updated: 21/02/2024