W3C home > Mailing lists > Public > www-validator@w3.org > June 2004

Re: [VE][108] New Error Message Suggestion

From: Ville Skyttä <ville.skytta@iki.fi>
Date: Thu, 03 Jun 2004 00:33:29 +0300
To: "www-validator@w3.org" <www-validator@w3.org>
Message-Id: <1086212009.30172.225.camel@bobcat.mine.nu>

On Wed, 2004-06-02 at 23:59, Jens Brueckmann wrote:
> >> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
> >> "http://www.w3.org/TR/REC-html40/loose.dtd">
> >
> > Wrong DTD for HTML 4.01 Transitional, you're specifying HTML 4.0
> > Transitional; the right one is:
> >
> > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
> >             "http://www.w3.org/TR/html4/loose.dtd">
> >
> > With that doctype, the document is valid according to the validator.
> It is, but what puzzles me is that both DTDs contain exactly the same  
> attributes list for the FORM element, as far as I can see.

Both http://www.w3.org/TR/REC-html40/loose.dtd and
http://www.w3.org/TR/html4/loose.dtd currently point to the exact same
file, the HTML 4.01 Transitional DTD.

> So why should Ljoha's choice of HTML 4.0 Transitional return an error  
> while HTML 4.01 Transitional will not?

The "real" HTML 4.0 Transitional DTD is at
http://www.w3.org/TR/1998/REC-html40-19980424/loose.dtd ...no "name"
attribute to <form> there.

Validator prefers public identifiers over system ones, and looks up if
it has a local copy of a DTD corresponding to a public identifier for
efficiency reasons.  It "knows" (among others) both HTML 4.01 and 4.0
public id's, and silently disregards the system id (which is the root of
the confusion above: HTML 4.0 Transitional public id with a HTML 4.01
Transitional system id).

See also http://www.w3.org/Bugs/Public/show_bug.cgi?id=739 and the list
of bugs it blocks.
Received on Wednesday, 2 June 2004 17:33:31 UTC

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