OpenCitations Meta Database Dump

This release contains the OpenCitations Meta data index, built with QLever 0.6.0 from version 9.2.1 of the RDF dataset: https://doi.org/10.5281/zenodo.23059736. The archive has six parts and contains both the index and a Qleverfile, which sets how the server runs. The download is 56.63 GB. The files need about 115.64 GB once extracted. To run the database, install Docker, 7-Zip and uv. Download all six volumes into the same directory, then extract the archive by opening its first volume with this command: 7zz x oc_meta_data_2026_09_22.7z.001 Enter the extracted folder and start the server with these commands, using version 0.6.0 of the QLever command-line tool: cd indicesuvx --from qlever==0.6.0 qlever start Once the server has started, send queries to http://localhost:7011. Word searches use ql:has-word triples stored in the index. For more about the data, see the OpenCitations Meta paper by Massari et al.: https://doi.org/10.1162/qss_a_00292. The QLever guide explains how to use the server: https://docs.qlever.dev/quickstart/.