Keyphrases
- ontology based data access
- query answering
- query language
- description logics
- query rewriting
- dl lite
- data exchange
- data integration
- ontology reasoning
- conjunctive queries
- integrity constraints
- database
- domain specific
- knowledge representation
- databases
- semantic web
- logic programming
- domain ontology
- expressive power
- co occurrence
- semantic annotation
- incomplete information
- data sources
- domain knowledge
- data model
- keywords