Keyphrases
- web retrieval
- database
- query processing
- user queries
- automatically generated
- database queries
- response time
- data structure
- data sources
- relevance feedback
- query expansion
- information retrieval
- range queries
- vector space
- user defined
- query formulation
- efficient processing
- object retrieval
- candidate set
- boolean queries
- search engine
- retrieval systems
- query evaluation
- image database
- search queries
- web search
- multiple queries