Category Archives: Open Citation Identifiers

Additional 31 million citations in COCI

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

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

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

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

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

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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The OpenCitations Enhancement Project – final report

The OpenCitations Enhancement Project Final report for the Alfred P. Sloan Foundation Report period: 1st May 2017 – 30 November 2018. Report written: 30th December 2018 Background OpenCitations (http://opencitations.net) is a scholarly infrastructure organization dedicated to open scholarship and the … Continue reading

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New release of COCI: 445M DOI-to-DOI citation links now available

As introduced in a previous blog post, COCI is the OpenCitations Index of Crossref open DOI-to-DOI references, all released as CC0 material. It is our first OpenCitations Index of open citations, in which we have applied the concept of citations … Continue reading

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

In a previous series of blog posts we proposed the treatment of bibliographic citations as first-class data entities, permitting citations to be endowed with descriptive properties. In doing so, we outlined some specific requirements, namely that the citations should be … Continue reading

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Citations as First-Class Data Entities: The Open Citation Identifier Resolution Service

Requirements for citations to be treated as first-class data entities In my introductory blog post, I listed five requirements for the treatment of citations as first-class data entities.  The fifth and final of these requirements is that there must be … Continue reading

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