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   Re: How to ??

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  • From: "Steven R. Newcomb" <srn@techno.com>
  • To: keshlam@us.ibm.com
  • Date: Wed, 17 Mar 1999 09:24:58 -0600

[Joe Kesselman:]

> So for now, the DOM really doesn't provide a good API for working
> with DTDs, and parsers and applications have to either accept those
> limits or fall back on nonstandard interfaces that may vanish in
> later versions of the code.

Uh, "nonstandard" is not the correct adjective.  "Non-W3C-recommended"
is much more correct.  In fact, there has been an internationally
standard model for the API to DTDs for over 3 years: the SGML Property
Set, found in ISO/IEC 10744:1997 ("HyTime") and in ISO/IEC 10179:1996

An API based on this internationally standard model is available in
the "MarkMinder" SGML engine, a plug-in module of the "GroveMinder"
product (see http://www.techno.com/gminder3.htm).  A demonstration of
GroveMinder is now available to prospective licensees.  It includes a
document set that includes XML, HyTime, SGML, Word and Excel
resources, it demonstrates extended hyperlinking using HyTime varlink
(aka XML XLink) and transclusions.  It provides a GroveMinder-based
http server in Python source form.  I demonstrated it during my talk
at XTech 99.

As for values of default attributes, the SGML Property Set allows the
API to report not only to report the defaulted value, but also the
fact that it was defaulted.  Indeed, one can tell exactly what was
explicitly in the document, and what was supplied at parse time.  I
hope and believe that the "XML Infoset" committee will come up with an
information set that will be equally revealing in this respect.


Steven R. Newcomb, President, TechnoTeacher, Inc.
srn@techno.com  http://www.techno.com  ftp.techno.com

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