Acyclicity Notions for Existential Rules and Their Application to Query Answering in Ontologies.
Bernardo Cuenca GrauIan HorrocksMarkus KrötzschClemens KupkeDespoina MagkaBoris MotikZhe WangPublished in: CoRR (2014)
Keyphrases
- query answering
- data exchange
- ontology based data access
- dl lite
- incomplete information
- conjunctive queries
- data complexity
- integrity constraints
- data integration
- answering queries
- ontology languages
- ontology mappings
- query rewriting
- datalog programs
- query answers
- inconsistent databases
- transitive roles
- schema mappings
- query relaxation
- tuple generating dependencies
- database schema
- knowledge base
- decision support
- data model
- database
- databases