User blog comment:FishTank/Categories and Navigation on Fandom/@comment-33359237-20190824090426

> Categories are a part of our communities that add grouping and association to pages. They’re also a very wiki-centric concept; as such, there is less general research available under that term, ...

There is plenty of research in information science about ontologies: https://en.wikipedia.org/wiki/Ontology_(information_science)