Thx, that is very helpful! If I understand correctly, ontology is about categorizing / defining / mapping relations between concepts. No surprise projects work

Thx, that is very helpful! If I understand correctly, ontology is about categorizing / defining / mapping relations between concepts. No surprise projects working on this exist. My question was about the 'indexing' step from there: concept -> number to identify it. So... it seems no universal standard there?