[dsdl-discuss] Re: Is SGML in scope for DSDL?

From: G. Ken Holman <gkholman@CraneSoftwrights.com>
Date: Mon Nov 04 2002 - 15:30:35 UTC

At 2002-11-01 08:55 +0000, Martin Bryan wrote:
>a) We are required by our charter from SC34 to come up with a mechanism that
>will allow the validation of SGML documents as well as XML documents

I thought we were only required to examine the possibility.

>b) Restricting ourself to XML 1.n features is not feasible as we have
>already identitifed features DSDL needs that XML 1.n will not define. In
>addition, we will need to be able to conform to XML 2.n, 3.n, etc, so
>writing a restriction to conform to XML 1.n into the spec will be a serious
>inhibition to the long term use of DSDL

I disagree ... I thought we were looking for namespace-based mechanisms for
adding information to an instance keeping entirely within the XML Infoset.

>c) Restricting ourselves to the XML Infoset is also irrational when we are
>going to provide information that is not currently included in the Infoset
>(e.g. characters subset info). Certainly we should ensure that all of the
>Infoset if covered, but to restrict ourselves to this minimalist approach is
>just not acceptable

I don't think we have reached such a conclusion yet.

>d) We have agreed that we need to be able to make the extensions such as
>datatypes and cardinality available to those using DTDs in preference to
>schemas (the vast majority of current users). If we extend DTDs then the
>extensions should be designed to work with SGML DTDs as well as with the
>subset of SGML DTDs adopted for XML 1.0

I didn't think we were doing *any* syntax changing (except the retrofit of
SGML for namespaces if that ended up being assessed as feasible, which I'm
not convinced of yet) ... I thought our work was entirely based on the
Infoset ... XML in and XML out with augmented information maintained using
existing information set facilities.

................... Ken

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Received on Mon Nov 4 16:30:45 2002

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