Keyphrases
- xml schema
- xml documents
- type definitions
- integrity constraints
- regular expressions
- relational databases
- xml data
- data exchange
- conceptual model
- semi structured documents
- regular tree languages
- markup language
- relational schema
- special features
- metadata
- building blocks
- object oriented
- databases
- general purpose
- pattern matching
- text mining
- training data
- context free grammars
- data interchange