Aristotle's Categories

  1. οὐσία Ousia (german) (IMHO Much better than Ousia

Basic formal ontology BFO

Boro

Cyc

DoDAF DM2

DOLCE Descriptive Ontology for Linguistic and Cognitive Engineering

GFO - General Formal Ontology

ISO 15926

PROTo ONtology

Onto-Step

Sowa

Sumo Suggested Upper Merged Ontology

Yamato

Other

Links