Keyphrases
- efficient processing
- database
- query processing
- query formulation
- processing cost
- processing queries
- query graph
- response time
- query evaluation
- query expansion
- xml query processing
- user queries
- directed graph
- random walk
- range queries
- flow graph
- graph theory
- semistructured databases
- graph model
- data structure
- join queries
- graph search
- rewriting rules
- connected components
- structured data
- user interaction
- relevance feedback
- data sources
- spanning tree
- complex queries
- graph mining
- database queries
- weighted graph
- graph matching
- aggregation queries
- retrieval systems
- data processing
- similarity graph
- proximity graph