upper ontology
ontology applicable across domains of knowledge
Descriptive Ontology for Linguistic and Cognitive Engineering
ontology for categories underlying natural language and human common sense
Suggested Upper Merged Ontology
type of upper ontology for computer systems
Cyc
knowledge base and artificial intelligence project
Basic Formal Ontology
The upper-level ontology upon which OBO Foundry ontologies are built.
PROTON
basic upper-level ontology