Keyphrases
- knowledge base
- spatial reasoning
- knowledge representation
- region connection calculus
- world knowledge
- topological relations
- predicate calculus
- wordnet
- conceptual modeling
- ontological framework
- upper level
- domain specific
- topological relationships
- spatial regions
- domain ontology
- constraint networks
- spatial relations
- spatial information
- interval algebra
- ontological engineering
- query processing
- relation algebra
- expert systems