Keyphrases
- query processing
- database
- response time
- data sources
- keywords
- user queries
- query execution
- database queries
- data structure
- query evaluation
- query expansion
- object retrieval
- indexing techniques
- relevance feedback
- similarity measure
- web search
- user defined
- range queries
- keyword search
- neural network
- databases
- access methods
- aggregate queries
- data sets