An Alternating Well-Founded Semantics for Query Answering in Disjunctive Databases.
Dietmar SeipelPublished in: FQAS (1998)
Keyphrases
- query answering
- databases
- data complexity
- data integration
- data exchange
- datalog programs
- inconsistent databases
- answering queries
- incomplete information
- conjunctive queries
- data integration systems
- integrity constraints
- logic programming
- ontology languages
- data management
- data model
- open world
- database
- fixpoint semantics
- deductive databases
- logic programs
- schema mappings
- inclusion dependencies
- data sources
- complexity of query answering
- query rewriting
- answer sets
- expressive power
- knowledge discovery
- fixpoint
- query answers
- regular path queries
- database queries
- closed world
- database schema
- database systems