Keyphrases
- expressive power
- information retrieval systems
- image database
- query answering
- information retrieval
- deductive databases
- text retrieval
- retrieval systems
- structured documents
- indexing techniques
- datalog programs
- logic programming
- multimedia
- document retrieval
- retrieval model
- shape retrieval
- multiple representations
- integrity constraints
- transitive closure
- complex systems
- query expansion
- knowledge base