Fixpoint Semantics for Query Answering in Data Integration Systems.
Zoran MajkicPublished in: APPIA-GULP-PRODE (2003)
Keyphrases
- query answers
- query answering
- data integration systems
- fixpoint semantics
- data complexity
- datalog programs
- data exchange
- conjunctive queries
- integrity constraints
- closed world assumption
- deductive databases
- query rewriting
- logic programs
- data integration
- answering queries
- fixpoint
- incomplete information
- schema mappings
- model theoretic
- regular path queries
- data sets
- xml queries
- data model
- computational complexity
- multi agent systems