Query Answering by Rewriting in GLAV Data Integration Systems Under Constraints.
Andrea CalìPublished in: SWDB (2004)
Keyphrases
- data integration systems
- query answering
- regular path queries
- query rewriting
- conjunctive queries
- query containment
- data exchange
- data complexity
- answering queries
- integrity constraints
- datalog programs
- regular expressions
- magic sets
- incomplete information
- data integration
- graph databases
- schema mappings
- semistructured data
- data sources
- query optimization
- pattern matching
- business intelligence
- unions of conjunctive queries
- database systems