Keyphrases
- query processing
- response time
- database
- query evaluation
- relevance feedback
- query expansion
- data structure
- query optimization
- query formulation
- database queries
- data sources
- query refinement
- user interaction
- user queries
- aggregate queries
- complex queries
- search engine
- result set
- boolean queries
- keyword search
- query terms
- vector space
- attribute values
- website
- information retrieval