Diamond OA journals present a publishing model that is free for both authors and readers, but their lack of indexing in major bibliographic databases such as Web of Science (WoS) and Scopus presents challenges in assessing the usage of these journals. This paper provides a global picture of the coverage of diamond OA journals from the Directory of Open Access Journals (DOAJ) in three data sources. Results show their low coverage in WoS and Scopus and higher coverage in OpenAlex, as well as the generally smaller and local scope of diamond OA journals.
| Research Data Curation and Management Works |
| Digital Curation and Digital Preservation Works |
| Open Access Works |
| Digital Scholarship |
