Yet Another More Advanced Top-level Ontology
Foundational ontology focusing on qualities, processes, and events. Continuously refined since 1999.
Visit WebsiteBrowse the tree, filter it, or click any class to see just its corner of it.
Where this one tends to earn its keep.
Process and event modeling
Quality-centric domain ontologies
Biomedical process representation
Industrial workflow modeling
I haven't checked this label against the actual licence text — it's the catalogue's original guess. Check the ontology's own site before you rely on it.
Others worth a look in Foundational.