Open Citations: More Than 624 Million Citations Now Available on COCI

From a Post by Silvio Peroni on the OpenCitations Blog:

COCI is the OpenCitations Index of Crossref open DOI-to-DOI citations, all released as CC0 material…

COCI is our first OpenCitations Index of open citations, in which we have applied the concept of citations as first-class data entities, each identified using a unique persistent Open Citation Identifier (OCI), to index the contents of one of the major databases of open scholarly citation information, namely Crossref, and to render and make available this information in machine-readable RDF.

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. This represents an increase of 40% in the number of indexed citations, compared with the second release of COCI on 12th November 2018, which indexed more than 445 million citations.

Access COCI Data

• can be queried by means of the COCI SPARQL endpoint;
• can be retrieved by using the COCI REST API;
• can be searched by using the COCI Search Interface;
• are also available as dumps on Figshare in CSV, N-Triples, and Scholix; and
• can be freely re-used for any purpose.

Learn More Read the Complete Blog Post

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