Relaxing Constraints on GeoPQL Operators to Improve Query Answering.
Arianna D'UliziaFernando FerriPatrizia GrifoniMaurizio RafanelliPublished in: DEXA (2006)
Keyphrases
- query answering
- data exchange
- data complexity
- consistency checking
- incomplete information
- data integration
- answering queries
- integrity constraints
- conjunctive queries
- inconsistent databases
- query containment
- regular path queries
- data integration systems
- databases
- dl lite
- xml data exchange
- query relaxation
- query rewriting
- schema mappings