Category Archives: Open Citation Identifiers

92 million new citations added to COCI

Posted on September 9, 2021 by Chiara Di Giambattista

It’s been a month since the announcement of 1.09 Billion Citations available in the July 2021 release of COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations.   We’re now proud to announce the September 2021 release of COCI, which is based on open references to works with DOIs within the Crossref dump dated August … Continue reading →

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From little acorns . . . A retrospective on OpenCitations

Posted on August 16, 2021 by David Shotton

The initial vision Now that OpenCitations is hosting over one billion freely available scholarly bibliographic citations, this is perhaps an opportune moment to look back to the start of this initiative. A little over eleven years ago, on 24 April … Continue reading →

Posted in Citations as First-Class Data Entities, JISC, Ontologies, Open Citation Identifiers, Open Citations, Open Science | Tagged , , , , , , , , , , , , | 1 Comment

Crossing a significant threshold: more than one billion citations now available in COCI!

Posted on August 4, 2021 by Chiara Di Giambattista

“The competitive benefits of closing access to citation data diminish with each new citation released to the public domain, but the benefits of open data remain. Going forward, citation data is almost completely public domain”. With these words, from the … Continue reading →

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Wikipedia Citations in Wikidata

Posted on July 21, 2021 by Chiara Di Giambattista

The interconnection between Wikipedia and Wikidata is now larger than ever.   The Wikipedia Citations dataset currently includes around 30M citations from Wikipedia pages to a variety of sources – of which 4M are to scientific publication. The increase of the connection with external data services … Continue reading →

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Additional 31 million citations in COCI

Posted on March 25, 2020 by Silvio Peroni

COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations, has just been extended with more than 31 million additional citations. Continue reading →

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OpenCitations described

Posted on February 26, 2020 by David Shotton

OpenCitations is an infrastructure organization for open scholarship dedicated to the publication of open bibliographic and citation data. We at OpenCitations are proud to announce the publication, in the first issue of Quantitative Science Studies, of a canonical paper in … Continue reading →

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Introducing InTRePIDs – In-Text Reference Pointer Identifiers

Posted on January 30, 2020 by David Shotton

Rationale Readers of this blog will be familiar with Open Citation Identifiers (OCIs), described in an earlier post and formally defined in [1]. OCIs enable bibliographic citations, treated as first class information entities, to be uniquely identified and referenced, and … Continue reading →

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The Open Biomedical Citations in Context Corpus: Progress Report

Posted on January 27, 2020 by marilena_daquino

The creation of the Open Biomedical Citations in Context Corpus (CCC) is the goal of a one-year project funded by the Wellcome Trust. The aim is to create a new open corpus of bibliographic and citation data that contain detailed information about individual in-text reference pointers in biomedical journal articles. Continue reading →

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More than 624 million citations now available on COCI

Posted on January 21, 2020 by Silvio Peroni

We are now proud to announce the third release of COCI, which contains more than 624 million DOI-to-DOI citation links coming from both ‘the ‘Open’ and the ‘Limited’ sets of Crossref reference data. Continue reading →

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COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations

Posted on April 15, 2019 by Silvio Peroni

COCI, the OpenCitations Index of Crossref open DOI-to-DOI citations Author(s) Ivan Heibi – ivan.heibi2@unibo.it Digital Humanities Advanced Research Centre (DHARC), Department of Classical Philology and Italian Studies, University of Bologna, Bologna, Italy Silvio Peroni – silvio.peroni@unibo.it Digital Humanities Advanced Research … Continue reading →

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