Keyphrases
- query processing
- database
- response time
- access methods
- data structure
- query evaluation
- database queries
- retrieval method
- keyword search
- relevance feedback
- range queries
- user defined
- user queries
- query optimization
- data sets
- aggregate queries
- database systems
- databases
- retrieval systems
- structured data
- vector space
- query expansion
- nearest neighbor
- data objects
- image retrieval
- keywords
- result set
- skyline queries
- website
- object retrieval
- boolean queries