Reference lists for more than 60 million journal studies in Crossref are now free to view and reuse. (13 Sep 2022) The more than 60 million scientific-journal papers indexed by Crossref — the database that registers DOIs, or digital object identifiers, for many of the world’s academic publications — now contain reference lists that are…
(27 Oct 2021) Guest blog post by Alberto Martín-Martín, Facultad de Comunicación y Documentación, Universidad de Granada, Spain. In this post, as a contribution to Open Access Week, Alberto Martín-Martín shares his comparative analysis of COCI and other sources of open citation data with those from subscription services, and comments on their relative coverage. …
(22 Dec 2020) Recently Elsevier announced that it has signed the San Francisco Declaration on Research Assessment (DORA) and that it is going to make the reference lists of articles openly available in Crossref. Ludo Waltman, one of the founders of the Initiative for Open Abstracts (I4OA), former Editor-in-Chief of Elsevier’s Journal of Informetrics, shares…
(7 Sept 2020) The bi-monthly release of COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations has been published. In this latest release (dated 6 September 2020), COCI has been extended with more than 11 million additional citations. Now, COCI contains more than 733 million DOI-to-DOI citation links between more than 59.4 million bibliographic entities.…
(21 Jan 2020) COCI is the OpenCitations Index of Crossref open DOI-to-DOI citations, all released as CC0 material, and is described in the article Heibi I, Peroni S, Shotton D (2019). Software review: COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations. Scientometrics 121(2): 1213-1228. https://doi.org/10.1007/s11192-019-03217-6 COCI is our first OpenCitations Index of open citations, in…
(12 July 2018) A citation index is a bibliographic index recording citations between publications, allowing the user to establish which later documents cite earlier documents. Several citation indexes are already available, some of which are freely accessible but not downloadable (e.g. Google Scholar), while others can be accessed only by paying significant access fees (e.g.…
(22 January 2018) The academic discovery space seems to be buzzing again. This space has become relatively stable after the introduction and maturity of Web Scale Discovery between 2009-2013, but things seem to be hotting up once again, writes Aaron Tay. With the recent interest in integrating discovery of open access, as well as linked…
(16 January 2018) I4OC is a project which promotes the unrestricted availability of scholarly citation data by making metadata for references within academic articles publicly available. It aims to establish a global public web of linked scholarly citation data to enhance the discoverability of published content, explore connections between knowledge fields, and follow the evolution…
(11 July 2017) Launched back in April, the Initiative for Open Citations (I4OC) has a bold ambition: for 100% of citation data to be freely available for re-use. And so far this collaboration between publishers, researchers and other stakeholders is proving to be well on the way to achieving that goal. For users to be…
(12 May 2017) The question is posed by, Aaron Tay, Library Analytics Manager at Singapore Management University. Writing in his musingsinlibrarianship blog he posits that while bibliometrics and altmetrics tend to be used to measure the impact of articles/items produced by users in terms of cites or altmetrics, is it possible to flip this around to…