Keyphrases
- query processing
- response time
- database
- data structure
- query evaluation
- user interaction
- user defined
- relevance feedback
- search queries
- data sources
- query expansion
- user queries
- database queries
- complex queries
- original query
- query formulation
- skyline queries
- query optimization
- retrieval method
- cost model
- attribute values
- information retrieval systems
- neural network