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This page contains details of and links to all the data dumps of the OpenCitations Meta and OpenCitations Index. They are made available online by means of the support of Figshare and of the Internet Archive.

OpenCitations Meta

The OpenCitations Meta database stores and delivers bibliographic metadata for all publications involved in the OpenCitations Index.

Most recent OpenCitations Meta data dump - October 2023 Dump

Dump created on 2023-10-24. Compared to the previous dump, this one adds the metadata contained in OpenAIRE and in the Crossref dump dated September 2023. This dump includes information on:

Type and formatArchiveSize
Metadata (CSV)ZIP43 GB (10 GB zipped) on NTFS
Metadata and provenance (RDF)ZIP38.1 GB zipped on NTFS. It does not vary once extracted because it contains zipped JSON files

In addition, a CSV dump containing all the bibliographic resources identified by their own PIDs (e.g., DOI, PMID, ISSN) and their corresponding OMID (e.g., br/12345):

BR OMID map (CSV)ZIP4.6 GB (0.8 GB zipped)
Previous dumps

OpenCitations Index

The OpenCitations Index stores OMID-to-OMID references representing all the references gathered from several sources.

Most recent OpenCitations Index data dump - October 2023 Dump

Dump created on 2023-10-25. This dump includes information on:

Type and formatArchiveSize
Citation data (CSV)ZIP157.3 GB (24.7 GB zipped)
Citation data (N-Triple)ZIP1.3 TB (57.6 GB zipped)
Citation data (Scholix)ZIP1.6 TB (34.1 GB zipped)
Provenance data (CSV)ZIP286 GB (12.8 GB zipped)
Provenance data (N-Triple)ZIP2.3 TB (73 GB zipped)

In addition, a N-Triple dump containing information regarding the data source collection (e.g., COCI, DOCI, POCI, etc) of all the citation data:

Citation data sources' info (N-Triple)ZIP287 GB (16 GB zipped)