Keyphrases
- query formulation
- query processing
- response time
- user interaction
- efficient retrieval
- query evaluation
- interactive retrieval
- retrieval method
- search queries
- range queries
- keywords
- document search
- database
- database queries
- query expansion
- complex queries
- relevance feedback
- data sources
- multimedia
- web pages
- query biased
- effective retrieval
- user queries
- textual contents
- result set
- vector space
- index structure
- web search
- digital libraries
- information retrieval
- databases