Keyphrases
- query processing
- query evaluation
- database
- response time
- query formulation
- user queries
- query expansion
- object retrieval
- model checking
- efficient processing
- query execution
- relevance feedback
- user defined
- data structure
- keywords
- vector space
- aggregate queries
- retrieval accuracy
- boolean queries
- result set
- retrieval method
- range queries
- data sources
- search engine