Keyphrases
- deductive databases
- recent developments
- integrity constraints
- logic programming
- fixpoint
- query evaluation
- disjunctive deductive databases
- semantic query optimization
- integrity checking
- constraint checking
- recent advances
- declarative semantics
- model theoretic
- declarative language
- logic programs
- hypothetical reasoning
- fixpoint semantics
- general purpose
- conjunctive queries
- query language
- xml documents
- closed world assumption
- artificial intelligence