Keyphrases
- preprocessing
- feature extraction
- query language
- database
- range queries
- efficient processing
- web search engines
- query logs
- query processing
- user queries
- post processing
- neural network
- complex queries
- query formulation
- attribute values
- response time
- data sources
- image processing
- aggregate queries
- web search
- search engine
- probabilistic databases
- preprocessing step
- user defined
- retrieval systems
- databases
- data sets