Mixing Open and Closed World Assumptionin Ontology-Based Data Access: Non-Uniform Data Complexity.
Carsten LutzInanç SeylanFrank WolterPublished in: Description Logics (2012)
Keyphrases
- closed world
- data complexity
- query answering
- data exchange
- conjunctive queries
- null values
- query evaluation
- data integration
- schema mappings
- expressive power
- integrity constraints
- answering queries
- data management
- query rewriting
- ontology languages
- dl lite
- np complete
- xml schema
- stable model semantics
- databases
- incomplete information
- database