OpenCitations Meta RDF dataset of all bibliographic metadata and its provenance information

Version 7 2024-06-17, 13:33

Version 6 2024-04-06, 20:33

Version 5 2023-10-25, 22:32

Version 4 2023-06-28, 13:00

Version 3 2023-02-15, 12:50

Version 2 2022-12-20, 18:27

Version 1 2022-12-19, 13:34

dataset

posted on 2024-06-17, 13:33 authored by OpenCitations OpenCitations

Compared to the previous version, this release includes metadata related to citing and cited bibliographic resources added in the March 2024 version of Crossref.

This dataset contains all the bibliographic metadata and its provenance information (in JSON-LD format) included in OpenCitations Meta. The data and the provenance are organized through a complex structure of folders and subfolders, allowing you to quickly find any entity from its URI. The first level consists of the following folders, provided compressed and separately:

[folder "ar"]: contains the data and provenance of the responsible agent type entities (http://purl.org/spar/pro/RoleInTime);
[folder "br"]: contains the data and provenance of the entities of type bibliographic resource (http:///purl.org/spar/fabio/Expression);
[folder "id"]: contains the data and provenance of the identifier entities (http://purl.org/spar/datacite/Identifier);
[folder "ra"]: contains the data and provenance of the responsible agent type entities (http://xmlns.com/foaf/0.1/Agent);
[folder "re"]: contains the data and provenance of resource embodiment entities (http://purl.org/spar/fabio/Manifestation).

The inner folders are named through the supplier prefix of the contained entities. It is a prefix that allows you to recognize the entity membership index (e.g., OpenCitations Meta corresponds to 06*0).

After that, the folders have numeric names, which refer to the range of contained entities. For example, the 10000 folder contains entities from 1 to 10000. Inside, you can find the zipped RDF data.

At the same level, additional folders containing the provenance are named with the same criteria already seen. Then, the 1000 folder includes the provenance of the entities from 1 to 1000. The provenance is located inside a folder called prov, also in zipped JSON-LD format.

For example, data related to the entity is located in the folder /br/06250/10000/1000/1000.zip, while information about provenance in /br/06250/10000/1000/prov/1000.zip

This version of the dataset contains:

116,605,079 bibliographic entities
348,844,164 authors and 2,561,339 editors (counted by their roles, without disambiguating individual
724,563 publication venues
242,362 publishers

The compressed archives total 44GB, using the tar.gz compression algorithm, and expand to 145G when decompressed. The JSON-LD files inside the archives are further compressed using the zip algorithm. It is recommended to process these inner files as compressed without extracting them, to manage data more efficiently.

Additional information about OpenCitations Meta at the official webpage.