Keyphrases
- exptime complete
- description logics
- data complexity
- expressive power
- pspace complete
- expressive description logics
- np complete
- decision problems
- model checking
- transitive closure
- query answering
- tree automata
- satisfiability problem
- query containment
- data exchange
- knowledge base
- query evaluation
- reasoning tasks
- knowledge representation
- query language
- database
- objective function
- databases