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This page contains details of and links to all the data dumps of the OpenCitations Indexes, the Open Biomedical Citations in Context Corpus, 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.

Each dump of the Open Biomedical Citations in Context Corpus is composed by one single zip artchive containing all the information about actual data and provenance stored in JSON-LD.

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.

Table of content

OpenCitations Indexes
- COCI, the OpenCitations Index of Crossref open DOI-to-DOI references
Open Biomedical Citations in Context Corpus
OpenCitations Corpus

OpenCitations Indexes

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

Most recent COCI data dump - December 2020 Dump

Dump created on 2020-12-07. This dump includes information on:

60,778,357 bibliographic resources;
759,516,507 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	122.6 GB (18.4 GB zipped)
Citation data (N-Triple)	ZIP	808 GB (37.9 GB zipped)
Citation data (Scholix)	ZIP	678 GB (20.1 GB zipped)
Provenance data (CSV)	ZIP	168.5 GB (9.4 GB zipped)
Provenance data (N-Triple)	ZIP	1.7 TB (40.1 GB zipped)

September 2020 Dump

Dump created on 2020-09-06. This dump includes information on:

59,455,917 bibliographic resources;
733,367,140 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	118.4 GB (17.7 GB zipped)
Citation data (N-Triple)	ZIP	780 GB (36.6 GB zipped)
Citation data (Scholix)	ZIP	654 GB (19.4 GB zipped)
Provenance data (CSV)	ZIP	162.7 GB (9.1 GB zipped)
Provenance data (N-Triple)	ZIP	1.6 TB (38.7 GB zipped)

July 2020 Dump

Dump created on 2020-07-04. This dump includes information on:

58,876,621 bibliographic resources;
721,655,392 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	116.5 GB (17.4 GB zipped)
Citation data (N-Triple)	ZIP	767 GB (36 GB zipped)
Citation data (Scholix)	ZIP	643 GB (19.1 GB zipped)
Provenance data (CSV)	ZIP	160.1 GB (8.9 GB zipped)
Provenance data (N-Triple)	ZIP	1.58 TB (38.1 GB zipped)

May 2020 Dump

Dump created on 2020-05-12. This dump includes information on:

58,028,534 bibliographic resources;
702,772,530 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	113.4 GB (16.9 GB zipped)
Citation data (N-Triple)	ZIP	746 GB (35 GB zipped)
Citation data (Scholix)	ZIP	626 GB (18.6 GB zipped)
Provenance data (CSV)	ZIP	155.9 GB (8.7 GB zipped)
Provenance data (N-Triple)	ZIP	1.54 TB (37.1 GB zipped)

March 2020 Dump

Dump created on 2020-03-23. This dump includes information on:

55,622,845 bibliographic resources;
655,602,113 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	106 GB (15.7 GB zipped)
Citation data (N-Triple)	ZIP	697 GB (31.7 GB zipped)
Citation data (Scholix)	ZIP	584 GB (17.3 GB zipped)
Provenance data (CSV)	ZIP	144.9 GB (8.1 GB zipped)
Provenance data (N-Triple)	ZIP	1.44 TB (34.6 GB zipped)

January 2020 Dump

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

53,464,457 bibliographic resources;
624,183,532 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	101,1 GB (15 GB zipped)
Citation data (N-Triple)	ZIP	665 GB (30.3 GB zipped)
Citation data (Scholix)	ZIP	556 GB (16.5 GB zipped)
Provenance data (CSV)	ZIP	138 GB (7.7 GB zipped)
Provenance data (N-Triple)	ZIP	1.37 TB (33 GB zipped)

November 2018 Dump

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

46,534,705 bibliographic resources;
445,826,118 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	72 GB (11 GB zipped)
Citation data (N-Triple)	ZIP	481 GB (22 GB zipped)
Provenance data (CSV)	ZIP	77 GB (5.3 GB zipped)
Provenance data (N-Triple)	ZIP	292 GB (11 GB zipped)
Triplestore DB (Blazegraph)	ZIP	484 GB (67 GB zipped)

July 2018 Dump

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

45,145,889 bibliographic resources;
316,243,802 citation links.

Type and format	Archive	Size
Citation data (CSV)	ZIP	49 GB (8.2 GB zipped)
Citation data (N-Triple)	ZIP	333 GB (16 GB zipped)
Provenance data (CSV)	ZIP	54 GB (4.5 GB zipped)
Provenance data (N-Triple)	ZIP	206 GB (8 GB zipped)

Open Biomedical Citations in Context Corpus (CCC)

Most recent CCC data dump - March 2021 Dump

20 March 2021 Dump

Dump created on 2021-03-20. This dump includes information on:

64,810 citing bibliographic resources;
7,045,425 citation links.

Type	Archive
all entities	data + provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance, data (single n-quads file)

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	(data not available for technical reasons), provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance, data+provenance (single n-quads file)

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance

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.

Type	Archive
agent roles (ar)	data, provenance
bibliographic entries (be)	data, provenance
bibliographic resources (br)	data, provenance
identifiers (id)	data, provenance
responsible agents (ra)	data, provenance
resource embodiment (re)	data, provenance
corpus	triplestore, provenance