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   Proposed draft of XSchema document available

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  • From: "Simon St.Laurent" <SimonStL@classic.msn.com>
  • To: "Xml-Dev (E-mail)" <xml-dev@ic.ac.uk>
  • Date: Tue, 2 Jun 98 12:34:03 UT

[Forwarded for Peter Murray-Rust]
[John Cowan]

>I have posted a proposed draft XSchema document at
>http://www.ccil.org/~cowan/XSchema-draft-19980601.txt .
>I worked this out independently of the list, then read
>the archives.

Many thanks,

It appears to date from about 2 months ago? :-) It looks very similar to
(part of) the sort of deliverable we might expect from XSC V1.0. There is a
clear statement of many of the details which acts as a very useful starting

>I am posting this, not in order to preempt the work of the
>ad hoc XSchema group, but in order to provide a concrete
>substrate for discussion. The draft is by no means complete;
>it does not satisfy goal 8 (mechanisms for XSchema application),
>nor does it say anything about namespaces.

It is a very useful place to start from. This is the first public posting
of a DTD to represent conventional DTDs w.r.t. XML spec, though I suspect
that others have done very similar things. It's well set ou - but quite
long - and I won't comment on everything.

A few points. John normalises out PEs (as I think we have all implicitly
agreed), but maintains support for other entities (and NOTATIONs). This
raises the question:
	- should XSchemas support all aspects of *document* minimisation (e.g.
general entities)? If not, they can only be used with normalised XML docs
(because otherwise &foo; is uninterpretable.) My personal feeling is that
we have to support <!ENTITY> for this purpose.
	- should XSchemas support NOTATION? I am not the right person to answer
this :-)
	- John states that he sees XSchemas being used to support the valiadtion
of valid XML docs, but implies (I may have got this wrong) that they can't
be used with WF docs. I think XSchemas can and will be used with WF docs -
for adding semantics, authoring support, etc. I think a number of use also
see them being used for local validation.

>Comments would be greatly appreciated.

	I suggest that SimonStL might take parts of this and hack them into
whatever strawman he is  going to come up. Large chunks would probably
carry over unchanged.


Simon St.Laurent
Dynamic HTML: A Primer / XML: A Primer / Cookies

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