Keyphrases
- reachability queries
- query evaluation
- database
- query processing
- flow graphs
- user queries
- response time
- relevance feedback
- labeling scheme
- graph theory
- search engine
- data sources
- transitive closure
- retrieval systems
- query terms
- active learning
- graph matching
- database systems
- image segmentation
- query formulation
- graph structure
- keyword search
- data objects
- range queries
- keywords
- user interaction
- relational databases
- state space
- query language