Keyphrases
- query evaluation
- inverted lists
- signature file
- query processing
- query language
- deductive databases
- conjunctive queries
- probabilistic databases
- data management
- data complexity
- transitive closure
- xml data
- information retrieval systems
- regular expressions
- querying xml documents
- efficient query evaluation
- retrieval systems
- relevant documents
- user queries
- document collections
- query answers
- query engine
- information retrieval
- indexing scheme
- keywords
- disjunctive deductive databases
- document retrieval
- document clustering
- query optimization
- knowledge representation
- relational databases
- databases