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Re: SGML default attributes.

• From: "Liam R. E. Quin" <liam@w3.org>
• To: Rick Jelliffe <rjelliffe@allette.com.au>, xml-dev@l...
• Date: Sat, 07 May 2016 02:42:26 -0400

On Fri, 2016-05-06 at 12:47 +1000, Rick Jelliffe wrote:
> 
[...]
> Also on Eliots point that dtds etc have limitations in their power: 

All formal systems, of course, are limited, whether by the Arch of
Compassion or by the mathematical inevitability of completeness :-)

> one
> limitation is how to capture (without resorting to ad hoc comments)
> some constraints that are beyond the expressive power of the grammar
> or are contingent in some way.  I believe Schematron is still the
> only system to take this seriously.
To some extent XSD does too, by allowing embedded Schematron rules :-)
or other extension mechanisms. DTDs do too, using processing
instructions, although it's terribly underspecified.

Best,

Liam


-- 
Liam R. E. Quin <liam@w3.org>
The World Wide Web Consortium (W3C)

• Follow-Ups:
  • Re: SGML default attributes.
    • From: Steve Newcomb <srn@coolheads.com>

• References:
  • Re: SGML default attributes.
    • From: "Norman Gray" <norman@astro.gla.ac.uk>
  • Re: SGML default attributes.
    • From: Eliot Kimber <ekimber@contrext.com>
  • Re: SGML default attributes.
    • From: Steve Newcomb <srn@coolheads.com>
  • Re: SGML default attributes.
    • From: Eliot Kimber <ekimber@contrext.com>
  • Re: SGML default attributes.
    • From: Steve Newcomb <srn@coolheads.com>
  • Re: SGML default attributes.
    • From: Eliot Kimber <ekimber@contrext.com>
  • Re: SGML default attributes.
    • From: Eliot Kimber <ekimber@contrext.com>
  • Re: SGML default attributes.
    • From: "Liam R. E. Quin" <liam@w3.org>
  • Re: SGML default attributes.
    • From: Rick Jelliffe <rjelliffe@allette.com.au>