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Important design points
- Not just datatypes but a type system
- Type derivation by restriction, extension
- Type substitution rules
- Framed in terms of infoset not the character stream: input and results
- All schema components first class (web) objects
- Extensible annotations on all schema components
- Layered interoperability architecture:
- Conceptual level
- Transfer syntax level
- Web interoperability level
- Validity is not a binary choice
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Copyright (c) 2001 Mary Holstege
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