OpenCitations Data Downloads
Access all data dumps from OpenCitations Meta and OpenCitations Index
Data available through Figshare and the Internet Archive
Bibliographic metadata for all publications in the OpenCitations Index
Latest: February 2025 Dump
Includes data on 121M+ bibliographic entities, 368M+ authors, and 698K+ publication venues
View Meta DownloadsOMID-to-OMID references representing all citations from multiple sources
Latest: March 2025 Dump
Includes data on 2.1 billion+ citations from various sources
View Index DownloadsOpenCitations Meta
The OpenCitations Meta database stores and delivers bibliographic metadata for all publications involved in the OpenCitations Index.
Most recent OpenCitations Meta data dump - February 2025
Released on 2025-02-13, this dataset enhances its previous version by incorporating new data from the Crossref November 2024 Dump, as well as the November 2024 dump of JaLC (Japan Link Center).
Key Statistics
121M+
Bibliographic entities
368M+
Authors
698K+
Publication venues
Download Files
| Type and format | Archive | Size |
|---|---|---|
| Metadata (CSV) | Download tar | 48G (12G zipped) on ext4 |
| Metadata and provenance (RDF) | Download tar.gz | 145G (47G compressed) on ext4 |
Additional Files
| Type and format | Archive | Size |
|---|---|---|
| A CSV dump storing a mapping between all OMIDs and their corresponding PID(s) (e.g., DOI, ORCID, PMID, etc) | Download ZIP | 6.5 GB (1.5 GB zipped) |
Previous dumps
Compared to the previous dump, this one adds the metadata contained in the Crossref dump dated March 2024.
Available in CSV (metadata) and JSON-LD (metadata and provenance) formats.
Compared to the previous dump, this one incorporates OpenAlex IDs, leveraging data from the OpenAlex dump.
Available in CSV (metadata) and RDF (metadata and provenance) formats.
Compared to the previous dump, this one adds the metadata contained in the Japan Link Center (JaLC).
Available in CSV (metadata) format.
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2023-10-24: Adds the metadata from OpenAIRE and the Crossref dump dated September 2023.
Available in CSV (metadata) and JSON-LD (metadata and provenance) formats.
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2023-06-28: Adds the metadata from the dump of NIH Open Citation Collection dated November 2022.
Available in CSV (metadata) and JSON-LD (metadata and provenance) formats.
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2023-02-24: Adds the metadata from the last dump of DataCite dated 22 October 2021.
Available in CSV (metadata) and JSON-LD (metadata and provenance) formats.
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2022-12-20: Based on open references to works with DOIs within the Crossref dump dated December 2022.
Available in CSV (metadata) and JSON-LD (metadata and provenance) formats.
OpenCitations Index
The OpenCitations Index stores OMID-to-OMID references representing all the references gathered from several sources.
Most recent OpenCitations Index data dump - March 2025
Released on 2025-03-24, this dataset adds the citation data contained in the Crossref dump dated November 2024.
Key Statistics
2.1 Billion+
Citations (2,155,497,918)
Download Files
| Type and format | Archive | Size |
|---|---|---|
| Citation data (CSV) | Download ZIP | 220 GB (34.4 GB zipped) |
| Citation data (N-Triple) | Download ZIP | 1.9 TB (80.6 GB zipped) |
| Citation data (Scholix) | Download ZIP | 1.9 TB (40 GB zipped) |
| Provenance data (CSV) | Download ZIP | 410 GB (18 GB zipped) |
| Provenance data (N-Triple) | Download ZIP | 3.1 TB (95 GB zipped) |
Additional Files
| Type and format | Archive | Size |
|---|---|---|
| Citation data sources' info (N-Triple): information regarding the data source collection (e.g., COCI, DOCI, POCI, etc) of all the citation data | Download ZIP | 388 GB (23.7 GB zipped) |
| Citation data sources' info (CSV): information regarding the data source collection (e.g., COCI, DOCI, POCI, etc) of all the citation data | Download ZIP | 97 GB (21 GB zipped) |
| Citation count data (CSV): the number of incoming citations to each bibliographic entity (identified by an OMID) in OpenCitations Index | TBA |
Previous dumps
Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).
In addition, a N-Triple dump containing information regarding the data source collection, and a citation count dump with the number of incoming citations to each bibliographic entity (identified by an OMID).
Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).
In addition, a N-Triple dump containing information regarding the data source collection, and a citation count dump with the number of incoming citations to each bibliographic entity (identified by an OMID).
Available in CSV (citation data), N-Triple (citation data), SCHOLIX (citation data), CSV (provenance data), and N-Triple (provenance data).
In addition, a N-Triple dump containing information regarding the data source collection.