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   Re: XSchema Question 3: Internal/External subsets

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  • From: Peter Murray-Rust <peter@ursus.demon.co.uk>
  • To: "Xml-Dev (E-mail)" <xml-dev@ic.ac.uk>
  • Date: Sat, 30 May 1998 21:27:54

At 16:40 30/05/98 UT, Simon St.Laurent wrote:
>This was actually one of the questions I was planning for the end, but
>recent examples have made me move it to the front.
>Should XSchema provide internal and external subsets, as do XML DTD's?

Some clarification in terminology would help here :-).  There is:
	- an external DTD subset (in a file foo.dtd or xschema.dtd)
	- an internal DTD subset (within [...] in the DOCTYPE)
	- an external XSchema (in a file *.xsc)
	- an internal XSchema [subset] within <XSC:*> elements

There are several concerns.
	- should we allow DTD subsets and XSchemas to be mixed in a document
instance (whether delivered externally or internally)
	- should we allow internal XSchemas (if so, should we use RDF notation)
	- should we allow external XSchemas (I assume yes). If so, should they use
	- should we allow internal and external XSchemas to be mixed.

If we can agree on internalXSchema and externalXSchema then the questions
are clearer.


Peter Murray-Rust, Director Virtual School of Molecular Sciences, domestic
net connection
VSMS http://www.nottingham.ac.uk/vsms, Virtual Hyperglossary

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