Cooperative Query Answering Using Multiple Layered Databases.
Jiawei HanYongjian FuRaymond T. NgPublished in: CoopIS (1994)
Keyphrases
- query answering
- databases
- cooperative
- data integration
- data exchange
- integrity constraints
- data complexity
- conjunctive queries
- inconsistent databases
- answering queries
- database
- data integration systems
- incomplete information
- query rewriting
- multi agent systems
- information systems
- relational databases
- data mining
- data management
- knowledge discovery
- ontology based data access
- query answers
- schema mappings
- datalog programs
- query optimization
- decision support
- data sources
- data model