A general datalog-based framework for tractable query answering over ontologies.
Andrea CalìGeorg GottlobThomas LukasiewiczPublished in: PODS (2009)
Keyphrases
- query answering
- data exchange
- ontology based data access
- dl lite
- data complexity
- integrity constraints
- incomplete information
- conjunctive queries
- data integration
- special case
- answering queries
- ontology languages
- query rewriting
- schema mappings
- transitive roles
- databases
- complexity of query answering
- expressive power
- description logics
- knowledge representation
- first order logic
- query containment
- inconsistent databases
- database systems
- knowledge base