Wikidata Knowledge Graph
Largest open collaboratively edited multilingual knowledge graph with 100M+ items. Structured data backbone for Wikipedia.
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.
Power Wikipedia infoboxes and Wikidata queries
Train NLP models with structured world knowledge
Build knowledge-grounded AI assistants
Link enterprise data to global identifiers
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 Knowledge Graphs.