Keyphrases
- query language
- query evaluation
- query processing
- response time
- query containment
- range queries
- complex queries
- web search engines
- database
- linear combination
- probabilistic databases
- aggregate queries
- inverted index
- query answering
- query logs
- search queries
- conjunctive queries
- databases
- efficient processing
- data sources
- data objects
- relevance feedback
- query terms
- retrieval systems
- user queries
- multi dimensional