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This page contains details of and links to all the data dumps of the Open Citation Indexes and of the OpenCitations Corpus (OCC). They are made available online by means of the support of Figshare and of the Internet Archive.

Each dump of an OpenCitations Index is composed by four zip archives. Two of these archives contains the actual data and provenance information of the index in N-Triples, while the other two archives contain the same information in CSV.

Instead, each dump of the OpenCitations Corpus is composed by several zip archives, each containing either data or provenance information relating to a particular sub-dataset within the OCC. After unzipping an archive, one needs to use Disk ARchive (DAR) - a multi-platform archive tool for managing huge amount of data - to recreate the whole OCC structure.

OpenCitations Indexes

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

Most recent COCI data dump - January 2020 Dump

Dump created on 2020-01-21. This dump includes information on:

• 53,464,457 bibliographic resources;

• 624,183,532 citation links.

November 2018 Dump

Dump created on 2018-11-12. This dump includes information on:

• 46,534,705 bibliographic resources;

• 445,826,118 citation links.

July 2018 Dump

Dump created on 2018-07-04. This dump includes information on:

• 45,145,889 bibliographic resources;

• 316,243,802 citation links.

OpenCitations Corpus (OCC)

Most recent OCC data dump - December 2017 Dump

25 December 2017 Dump

Dump created on 2017-12-25. This dump includes information on:

• 298,797 citing bibliographic resources;

• 6,488,914 cited bibliographic resources;

• 12,652,601 citation links.

25 November 2017 Dump

Dump created on 2017-11-25. This dump includes information on:

• 283,215 citing bibliographic resources;

• 6,251,266 cited bibliographic resources;

• 11,976,217 citation links.

25 October 2017 Dump

Dump created on 2017-10-25. This dump includes information on:

• 264,835 citing bibliographic resources;

• 5,967,178 cited bibliographic resources;

• 11,207,388 citation links.

25 September 2017 Dump

Dump created on 2017-09-25. This dump includes information on:

• 245,504 citing bibliographic resources;

• 5,683,435 cited bibliographic resources;

• 10,457,170 citation links.

25 August 2017 Dump

Dump created on 2017-08-25. This dump includes information on:

• 225,645 citing bibliographic resources;

• 5,358,479 cited bibliographic resources;

• 9,607,259 citation links.

25 July 2017 Dump

Dump created on 2017-07-25. This dump includes information on:

• 203,301 citing bibliographic resources;

• 4,972,748 cited bibliographic resources;

• 8,652,486 citation links.

25 June 2017 Dump

Dump created on 2017-06-25. This dump includes information on:

• 180,403 citing bibliographic resources;

• 4,575,269 cited bibliographic resources;

• 7,730,161 citation links.

May 2017 OCC Dump

Dump created on 2017-05-25. This dump includes information on:

• 159,451 citing bibliographic resources;

• 4,173,318 cited bibliographic resources;

• 6,819,745 citation links.

April 2017 OCC Dump

Dump created on 2017-04-26. This dump includes information on:

• 139,822 citing bibliographic resources;

• 3,781,435 cited bibliographic resources;

• 5,976,771 citation links.

March 2017 OCC Dump

Dump not submitted for technical reasons.

February 2017 OCC Dump

Dump not submitted for technical reasons.

January 2017 OCC Dump

Dump not submitted for technical reasons.

December 2016 OCC Dump

Dump created on 2016-12-24. This dump includes information on:

• 60,119 citing bibliographic resources;

• 1,935,661 cited bibliographic resources;

• 2,586,233 citation links;

• 40,314 containers (journals, books, etc.);

• 136,365 ORCID identifiers.

November 2016 OCC Dump

Dump not submitted for technical reasons.

October 2016 OCC Dump

Dump created on 2016-10-24. This dump includes information on:

• 1,461,441 citing/cited bibliographic resources;

• 1,796,048 citation links;

• 32,301 containers (journals, books, etc.);

• 115,542 ORCID identifiers.

September 2016 OCC Dump

Dump created on 2016-09-24. This dump includes information on:

• 953,736 citing/cited bibliographic resources;

• 1,106,920 citation links;

• 25,772 containers (journals, books, etc.);

• 92,833 ORCID identifiers.