Lists Home |
Date Index |
- From: Tim Bray <firstname.lastname@example.org>
- To: Chris Lilley <email@example.com>, firstname.lastname@example.org
- Date: Thu, 08 Apr 1999 08:22:19 -0700
At 01:38 AM 4/7/99 +0200, Chris Lilley wrote:
I mostly agree with Chris, but a couple of notes.
>True, but the assertion was made that validation should never be
>required because of the performance load (compared to parsing the dtd
>including external subsets, but not validating). Which implies, if there
>were negligible performance load, them whould validation be a desirable
It still depends. In lots of scenarios, validation isn't worth even
an extra 1% investment in time. In lots of scenarios, there's no DTD!
Having said that, a guaranteed-lightweight validation protocol would
>I didn't like it much either, but it seemed to be, on inspection, what
>the XML spec said.
>James Clark seemed to agree, which was a good sign. But I recently heard
>Tim Bray and CMSQ say that no, it doesn't mean that at all
What the spec itself says is more important than what any of us
individuals say. I really don't think you can find justification
in the spec for the notion that the existence of a <!DOCTYPE is
a signal requiring any kind of action.
>(not to UI designers, provide two
>separate icons for "validate" and "check wf" )
Yes! IE5 has a nice validation capability, but no way (that I've
found) for the user to invoke it. Is there one?
>Next question, should there be (in other words, is this something that
>should be in the document instance).
Good question; I can see both sides. But in fact, Chris, I think what's
motivating you here is less a concern for forcing validation than a
concern for forcing the use of the external DTD for entity declarations
& attribute defaults and so on. Which is fine; but I think there are
2 separate questions here:
- should a document be able to ask for validation
- should a document be able to ask for guaranteed reading of all
Related but distinct. -Tim
xml-dev: A list for W3C XML Developers. To post, mailto:email@example.com
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:firstname.lastname@example.org the following message;
To subscribe to the digests, mailto:email@example.com the following message;
List coordinator, Henry Rzepa (mailto:firstname.lastname@example.org)