Keyphrases
- xml schema
- xml documents
- xml data
- regular expressions
- integrity constraints
- xml queries
- markup language
- object oriented
- data exchange
- data representation
- semi structured documents
- relational databases
- xml databases
- data centric
- relational schema
- extensible markup language
- building blocks
- metadata
- conceptual model
- data interchange
- relational database systems
- relational model
- domain specific
- data model