Keyphrases
- database
- data structure
- flow graphs
- query processing
- relevance feedback
- multi dimensional
- user queries
- range queries
- query graph
- database queries
- data sources
- response time
- query formulation
- retrieval method
- query evaluation
- reachability queries
- data cube
- neural network
- keyword search
- graph theory
- directed graph
- vector space
- index structure
- aggregate queries
- query expansion
- similarity graph
- xml documents