W3C home > Mailing lists > Public > www-validator-css@w3.org > December 2005

Re: Vendor Specific Extensions

From: Anne van Kesteren <annevk@opera.com>
Date: Sun, 18 Dec 2005 11:06:55 +0100
To: "Christian Roth" <roth@visualclick.de>, www-validator-css@w3.org
Message-ID: <op.s1y41ta564w2qv@id-c0020.oslo.opera.com>

On Sun, 18 Dec 2005 10:57:05 +0100, Christian Roth <roth@visualclick.de>  
>> <bfrohs@frohsenwebdesign.com> wrote:
>>> I'm just hoping the css validator can be made to support these vendor
>>> specific extensions. I know in w3 documentation, it says these
>>> extensions should be avoided, but it does not say they should never be
>>> used.
>> The validator "validates" recommendations issued by the W3C. Not
>> (un)documented extensions from third parties.
> So is using proprietary extensions in a way specified e.g. in CSS 2.1
> making the stylesheet an invalid CSS stylesheet? Or is it merely making
> it just an invalid CSS 2.1 (or CSS 3, 1, 42) stylesheet?

They will always be invalid. Properties starting with such prefixes are  
just known not to be reused by the CSS WG/W3C so they can safely be used  
to experiment without causing problems in the future.

Anne van Kesteren
Received on Sunday, 18 December 2005 10:07:07 UTC

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