Here is what OpenAlex (the source database Keenious connects with) says about where it finds the works it indexes:
Research outputs are the main artery of the system. When a researcher publishes an article, book, dataset, etc. information about those outputs are registered with registry agencies like Crossref and DataCite or institutional and national repositories, like HAL. We pull information on those outputs from these sources and others* and then try to make that information to known entities in PID (persistent identifier) providers. For instance: matching affiliation text to known institutions in ROR, authors to ORCIDs, or journal titles to ISSN. This form the foundation of the knowledge graph. But we also link research outputs to other outputs (by extracting reference metadata) and run text classifiers on title and abstract text to understand what the research is about, linking it to known topics, subjects, and even SDGs.
*For more about OpenAlex and its sources, see the OpenAlex About Us page and the How OpenAlex Works page.
