Keyphrases
- semi structured data
- multi dimensional
- index structure
- structured data
- semi structured
- xml documents
- path expressions
- web mining
- xml data
- database
- mining frequent
- range queries
- semi structured information
- tree structured data
- web data
- data model
- information extraction
- b tree
- relational databases
- recursive queries
- unordered trees
- data sets
- low dimensional
- heterogeneous data
- data structure
- information retrieval
- machine learning
- ordered trees