Keyphrases
- query processing
- query language
- web search engines
- response time
- query evaluation
- user defined
- database queries
- range queries
- database
- efficient processing
- query formulation
- search queries
- query logs
- desktop search
- retrieval systems
- data sets
- user queries
- query answering
- attribute values
- information retrieval systems
- data sources
- result set
- keyword queries
- data structure
- search engine
- tree patterns
- aggregate queries
- probabilistic databases
- boolean queries
- query answers
- document retrieval