Keyphrases
- data streams
- hierarchical tree
- categorical data
- data sets
- main contribution
- tree structure
- neural network
- clustering algorithm
- sliding window
- cluster analysis
- tree adjoining grammar
- graph theoretic
- hierarchical clustering
- document clustering
- hierarchical structure
- distance metric
- self organizing maps
- clustering method
- unsupervised learning
- probabilistic model
- data structure