Keyphrases
- query evaluation
- query language
- query processing
- conjunctive queries
- deductive databases
- data complexity
- data management
- transitive closure
- xml data
- probabilistic databases
- first order logic
- efficient query evaluation
- inverted lists
- regular expressions
- querying xml documents
- constraint databases
- disjunctive deductive databases
- query processing strategies
- data model
- query answers
- query engine
- tree pattern queries
- data exchange
- xml documents
- database systems
- universally quantified
- data mining
- data sets