Keyphrases
- semi structured data
- structured data
- semi structured
- web mining
- xml data
- mining frequent
- xml documents
- kernel function
- ordered trees
- feature space
- kernel methods
- heterogeneous data
- tree kernels
- recursive queries
- web data
- tree structured data
- unordered trees
- semi structured information
- unstructured data
- path expressions
- information extraction
- data model
- data analysis
- database
- metadata
- machine learning
- data sets