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   Re: Non-Validating XML Parsers: Requirements

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  • From: Richard Tobin <richard@cogsci.ed.ac.uk>
  • To: Chris Hubick <maillist@chris.hubick.com>, xml-dev@ic.ac.uk
  • Date: Tue, 4 Aug 1998 11:13:47 +0100 (BST)

> This would mean that the grammer has PE
> references in places that are not allowed in the internal subset,

Yes; a document must satisfy the grammar rules and the constraints.

> suggesting those are only valid in the external subset, yet the
> grammer leaves them out in many places where they are allowed in the
> external subset!

Earlier drafts of the standard attempted to indicate where paramater
entities could occur by special syntax in the grammar rules.  This made
them very hard to read.

I think that to do this right would need two grammars; one for the
unexpanded source and one for the result after expansion.

-- Richard

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