Knowledge base statistics: as of 2026/02/19
Total TermsTotal AxiomsTotal Rules
15525 213430 7410

Relations: 1751
non-linguistic axioms: 160507

Ground tuples: 205935
  of which are binary: 147706
  of which arity more than binary: 58314

Rules: 7410
  of which are horn: 2519
first-order: 5463
temporal: 843
modal: 274
epistemic: 87
other higher-order: 848



Sigma web home      Suggested Upper Merged Ontology (SUMO) web home
Sigma version 3.0 is open source software produced by Articulate Software and its partners