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PUBLIC id in notations


public id
Title: PUBLIC id in notations

Anyone who can advise:

Some time ago I raised the issue of discrepancies between XML1.0 and XML Schema with regard to notations, but I've forgotten the outcome and can't find the thread. Can anyone can enlighten me?

XML1.0 says that the PUBLIC identifier is optional. The schema rec cannot make up it's mind.

In 3.12.1 "The Notation Declaration Schema Component", public identifier is given as optional.

In 3.12.2 "XML Representation of Notation Declaration", and in the schema for Schema, it is given as mandatory (and is treated this way by a number of processors). Of course, the schema for schemas has no choice, since at least one of system or public is required and XSD can't express this as a co-constraint.

Can anyone explain:
a) Why this mismatch with XML1.0 was introduced in XSD?
b) Is it actually a bug which will be changed?
c) If it isn't a bug, what is the recommended way of converting DTDs into XSD when no public identifiers are given?

Any help appreciated.

John



_______________________________________________________
John Anderson

CTO BarbadosoftTM
The XML Management Company
+31 (0)20 750 7582 / +31 (0)6 55 347 448 / www.barbadosoft.com

- putting the "X" in "XML" -


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