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wordnet
Top Level Ontology
- Upper Cyc Ontology
- ISO/FDIS 15926-2
- Philippe Martin's Top Level Ontology
- WordNet
- SUMO, Suggested Upper Merged Ontology
- KR Ontology, Sowa
- The Generalized Upper Model 2.0
Types:
Comment:
online lexical reference system -- based on 'psycholinguistic theory'
Comment:
holonym -- hypernym -- hyponym -- antonym -- of course, we know what these all mean...
Comment:
115000 nouns -- 11000 verbs -- 21000 adjective
Comment:
english nouns, verbs, adjectives and adverbs are organized into 'synsets' (synonym groups) -- relations between synonym groups
Comment:
database comes with a search interface -- available as Debian package