Keyphrases
- tree nodes
- tree structures
- tree structure
- labeled trees
- decision trees
- leaf nodes
- tree patterns
- ordered trees
- tree kernels
- frequent subtrees
- dynamic programming
- tree models
- unordered trees
- search space
- information retrieval
- xml documents
- xml trees
- tree construction
- tree mining
- binary trees
- databases
- rooted trees
- data sets