Optimizing Query Answering under Ontological Constraints.
Giorgio OrsiAndreas PierisPublished in: Proc. VLDB Endow. (2011)
Keyphrases
- query answering
- data exchange
- consistency checking
- conjunctive queries
- integrity constraints
- incomplete information
- query containment
- data complexity
- regular path queries
- data integration
- answering queries
- tuple generating dependencies
- data integration systems
- inconsistent databases
- query rewriting
- datalog programs
- query relaxation
- dl lite
- schema mappings
- databases
- complexity of query answering
- database schema
- end users