A General Datalog-Based Framework for Tractable Query Answering over Ontologies (extended abstract).
Andrea CalìGeorg GottlobThomas LukasiewiczPublished in: SEBD (2009)
Keyphrases
- query answering
- extended abstract
- data exchange
- ontology based data access
- data complexity
- dl lite
- answering queries
- incomplete information
- ontology languages
- integrity constraints
- special case
- datalog programs
- conjunctive queries
- complexity of query answering
- data integration
- schema mappings
- expressive power
- semantic web
- query answers
- computational complexity
- knowledge base
- description logics
- data sources
- query containment
- data model
- unions of conjunctive queries
- inconsistent databases
- transitive roles