OpenCitations OMID Index for Bibliographic Resources (BR) and Responsible Agents (RA)

The dataset is one comressed ZIP file which stores two CSV files. The first file (meta_br.csv) is dedicated to Bibliographic Resources (BRs) and reports the corresponding OMID(s) for each resource identified by a persistent identifier (PID), such as a DOI, PubMed ID, or similar identifiers. The second file (meta_ra.csv) concerns Responsible Agents (RAs) and provides the corresponding OMID(s) for each agent identified by an ORCID.

In both files, the first column contains the PID, while the second column reports the associated OMID(s) (in case of multiple values a "; " is used as separator).

These files were generated from the January 2026 dump of OpenCitations Meta, available at: https://download.opencitations.net/#meta