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Re: [cssom] Update on the CSSOM

From: Dave Raggett <dsr@w3.org>
Date: Tue, 16 Jan 2007 13:13:07 +0000 (GMT)
To: Anne van Kesteren <annevk@opera.com>
Cc: www-style@w3.org
Message-ID: <Pine.LNX.4.64.0701161254480.5331@holly>

As a matter of interest, does the proposal cover the ability for web 
page authors to define application specific CSS properties?

The ability to interpret markup extensions has shown its value when 
it comes to trying out new ideas, enabling their effectiveness to be 
tested on a wide scale before making any decision on the potential 
for standardization. CSS has long lacked this ability and that has 
hindered experimentation. In principle, you could edit the browser 
source code where available, but this tends to be very hard and 
further more greatly reduces the number of people able to try out 
the new properties. An example is the difficulty involved in 
implementing the CSS3 speech properties.

I would therefore like the CSSOM to include support for registering 
a new property name together with a handler for parsing the string 
value and returning an object that can then be retrieved using the 
interface to accessing the computed styles for any element in the 
DOM tree. A more sophistocated option would be to provide the CSS 
property grammar using the syntax used in the CSS specifications, 
but I would be happy with just the simpler solution. Note that the 
registation would also cover details such as inheritance and initial 

  Dave Raggett <dsr@w3.org> http://www.w3.org/People/Raggett

On Tue, 16 Jan 2007, Anne van Kesteren wrote:

> Hi,
> I recently joined the CSS WG to work on a proposal called the 
> Cascading Style Sheets Object Model. The intention is that this 
> specification will effectively obsolete DOM Level 2 Style by 
> removing the problems it had and including some new APIs. The 
> latest version of the editor's draft is publicly available: 
> http://dev.w3.org/cvsweb/~checkout~/csswg/cssom/Overview.html?content-type=text/html;%20charset=utf-8
> Changes can be tracked through CVS: http://dev.w3.org/cvsweb/csswg/cssom/
> The proposal basically exists of three parts: "Accessing style 
> sheets through the DOM" which supercedes the "Document Object 
> Model Style Sheets" chapter from DOM Level 2 Style. "Cascading 
> Style Sheets APIs" which does the same for "Document Object Model 
> CSS" and "Layout APIs" which standardizes some of the DOM Level 0 
> APIs found in popular browsers related to layout.
> (The first part is probably the most stable thanks to Ian Hickson 
> having written up the extensions to the DocumentStyle interface.)

> Comments welcome (please prefix the subject with [cssom]), but 
> please note the status of the draft. It will change.
> Kind regards,
> -- 
> Anne van Kesteren
> <http://annevankesteren.nl/>
> <http://www.opera.com/>
Received on Tuesday, 16 January 2007 13:13:13 UTC

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