Keyphrases
- digital libraries
- database
- query processing
- response time
- directed graph
- online learning
- semantically related
- semantically similar
- query formulation
- query evaluation
- user queries
- monte carlo
- random walk
- data sources
- similarity graph
- keywords
- range queries
- graph matching
- graph theory
- weighted graph
- rewriting rules
- data structure
- query graph
- proximity graph
- flow graph
- result set
- bipartite graph
- keyword search
- search engine