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   Re: [xml-dev] Come On, DTD, Come On! Thoughts on DSDL Part 9

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(I have split the response into two separate emails so as to not 
cross-post; this is the answer to the XML-Dev mail list)

At 2002-06-11 13:31 -0400, John Cowan wrote:
>ISO/IEC 19757-9 is currently an empty hole titled "Datatype- and
>namespace-aware DTDs".

Yes, this part is at a formative, idea-collecting stage.

>This is a ragbag of ideas to fill that hole.

Thank you for the input!

>I am assuming that the context for extending DTDs is not redefining
>XML, but rather creating an enhanced XML DTD format which can be used by an
>external validator.  Examples of existing external validators are Jing
>for RELAX NG, XSV for W3C XML Schema, and Sun MSV for many different
>schema formats (including DTDs).  Enhanced DTDs would not be acceptable
>to XML validating parsers.

Yes, but early thoughts are that we don't want to "break" DTDs, so we will 
look at trying to come up with conventions of use of existing DTD syntax 
before introducing new syntax and/or declarations.

NOTATION declarations come to mind, but XML NDATA entity declarations do 
not have data attribute specifications the way that SGML NDATA entity 
declarations did.

However, we are collecting use-cases at this point and will begin proposing 
solutions when we think we have a representative collection of needs.  It 
would be a shame to begin standardizing ways of doing things before we know 
what everyone would like to see.

The home page for the DSDL project is http://dsdl.org ... it is a project 
of ISO/IEC JTC 1/SC 34/WG 1 and, as such, membership right now is by 
members of the national body committee of each participating country.

For those who are unaware, ISO/IEC JTC 1/SC 34/WG 1 is responsible for SGML 
and the annexes to SGML that are compatible with W3C XML 1.0.

ALL INPUT IS WELCOME!  Committee members will respond to your comments, 
John, on the public comment list that you posted to at 
dsdl-comment@dsdl.org that has a (close to real-time) public archive.

Anyone with use-cases for what they would like to see in a pipelined 
validation framework and family of international standards, please pass on 
your needs to us!

Thanks again, John, for the early contribution!

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

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