Keyphrases
- dl lite
- description logics
- possibility theory
- query answering
- data complexity
- computational complexity
- conjunctive queries
- first order logic
- query rewriting
- knowledge base
- expressive power
- reasoning tasks
- incomplete information
- logic programming
- ontology languages
- conditional independence
- semantic web
- artificial intelligence
- computational properties
- knowledge representation
- nonmonotonic reasoning
- belief revision
- integrity constraints
- probability theory
- data integration
- query optimization
- answering queries
- data exchange