Keyphrases
- expressive power
- deductive databases
- query answering
- reverse engineering
- datalog programs
- integrity constraints
- query language
- logic programming
- transitive closure
- relational algebra
- database languages
- relational calculus
- ontology based data access
- data complexity
- relational query languages
- dl programs
- conjunctive queries
- data integration
- containment of conjunctive queries
- relational databases
- high level