A general Datalog-based framework for tractable query answering over ontologies.
Andrea CalìGeorg GottlobThomas LukasiewiczPublished in: J. Web Semant. (2012)
Keyphrases
- query answering
- data exchange
- ontology based data access
- dl lite
- data complexity
- incomplete information
- data integration
- answering queries
- ontology languages
- conjunctive queries
- integrity constraints
- query rewriting
- special case
- expressive power
- ontology mappings
- computational complexity
- databases
- transitive roles
- datalog programs
- description logics
- np hard
- semantic web
- data sets
- knowledge base
- unions of conjunctive queries
- inconsistent databases
- np complete