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KB:
SUMO
Language:
ChineseLanguage
ChinesePinyinWriting
ChineseSimplifiedWriting
ChineseTraditionalLanguage
EnglishGroupLanguage
EnglishLanguage
FrenchLanguage
GermanLanguage
JapaneseLanguage
PortugueseLanguage
SpanishLanguage
SwedishLanguage
measuringListInterval
Formal Language:
OWL
SUO-KIF
TPTP
traditionalLogic
KB Term:
Knowledge base statistics:
as of 2026/07/21
Total Terms
Total Axioms
Total Rules
31544
497874
8202
Relations:
26337
non-linguistic axioms:
432453
Ground tuples:
489475
of which are binary:
411822
of which arity more than binary:
77850
Rules:
8202
of which are:
horn:
2775
first-order:
6005
higher-order:
2197
of which are:
temporal:
717
deontic:
109
epistemic:
130
other modal:
1107
Sigma web home
Suggested Upper Merged Ontology (SUMO) web home
Sigma version 3.0.0-
55e0ac83
(2026-07-10) is
open source software
produced by
Articulate Software
and its partners