Keyphrases
- response time
- database
- query evaluation
- keywords
- query formulation
- query processing
- relevance feedback
- retrieval method
- database queries
- range queries
- data sources
- query expansion
- heterogeneous databases
- query terms
- user defined
- data structure
- user queries
- multi dimensional
- vector space
- data streams
- website
- multimedia
- metadata
- information retrieval
- data sets