W3C home > Mailing lists > Public > public-html-xml@w3.org > December 2010

Re: What problem is this task force trying to solve and why?

From: John Cowan <cowan@mercury.ccil.org>
Date: Mon, 20 Dec 2010 16:25:07 -0500
To: Noah Mendelsohn <nrm@arcanedomain.com>
Cc: David Carlisle <davidc@nag.co.uk>, Henri Sivonen <hsivonen@iki.fi>, public-html-xml@w3.org
Message-ID: <20101220212506.GA17058@mercury.ccil.org>
Noah Mendelsohn scripsit:

> * Being liberal in what you accept has arguably proven useful on the
> Web, but we may offer better value in helping users to be conservative
> in what they send.  FWIW:  I find that XML validation of my (X)HTML
> sometimes trips on errors I wouldn't need to fix in practice, but
> often it catches errors that would cause a browser to skip significant
> content when rendering.  So, I find XML validation to be valuable;
> maybe or maybe not a good HTML5 validator would meet the need instead.
> Anyway, I think we need to think about the right mix of XML and HTML
> validation, in cases where users wish to ensure that generated or
> hand-authored content is correct.

Validation is important, and I'm not arguing against it.  What I don't
think matters is XML *validity*.  There are now many other useful ways
to validate documents that are not XML-valid.

In particular, the RELAX NG schemas for XHTML 1.0 are available at
http://www.thaiopensource.com/relaxng/xhtml , and they could be readily
updated for XHTML 1.1.  These schemas will confirm that a document is
structurally XHTML whether or not it is XML-valid.

> * I think that there are misunderstandings about the need to stop on 
> first error in dealing with XML, and I'm hoping to do a blog post setting 
> out some thoughts on that.  When/if I do, I'll send a link.

I agree, and I look forward to seeing that.

John Cowan  cowan@ccil.org   http://ccil.org/~cowan
It's the old, old story.  Droid meets droid.  Droid becomes chameleon.
Droid loses chameleon, chameleon becomes blob, droid gets blob back
again.  It's a classic tale.  --Kryten, Red Dwarf
Received on Monday, 20 December 2010 21:25:37 UTC

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