Keyphrases
- database
- query processing
- data structure
- query evaluation
- query expansion
- query execution
- data sources
- response time
- user queries
- query refinement
- efficient processing
- data sets
- query formulation
- database queries
- user defined
- relevance feedback
- user interaction
- nearest neighbor
- search queries
- retrieval method
- skyline queries
- complex queries
- query language
- keywords
- information retrieval
- machine intelligence
- retrieval accuracy
- object retrieval
- databases
- answering queries