Density Scores for Cooperative Query Answering.
Felix NaumannUlf LeserPublished in: Föderierte Datenbanken (1999)
Keyphrases
- query answering
- cooperative
- data exchange
- integrity constraints
- conjunctive queries
- data integration
- answering queries
- data complexity
- incomplete information
- query answers
- multi agent systems
- multi agent
- inconsistent databases
- query rewriting
- query containment
- data sets
- transitive roles
- dl lite
- data management
- data integration systems
- ontology based data access
- xml data exchange
- datalog programs
- np complete
- relational databases
- database