Keyphrases
- deductive databases
- integrity constraints
- logic programming
- fixpoint
- query evaluation
- disjunctive deductive databases
- semantic query optimization
- constraint checking
- integrity checking
- declarative language
- declarative semantics
- model theoretic
- data analysis
- closed world assumption
- conjunctive queries
- high level
- datalog programs
- hypothetical reasoning
- stable models
- xml data