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Re: WICD Core 10.0: Intended Layout

From: Timur Mehrvarz <timur.mehrvarz@web.de>
Date: Wed, 13 Aug 2008 10:59:06 +0200
Cc: "public-cdf@w3.org" <public-cdf@w3.org>, "public-bpwg-comments@w3.org" <public-bpwg-comments@w3.org>, "public-bpwg-ct@w3.org" <public-bpwg-ct@w3.org>
Message-Id: <D839DBF7-09C2-4BF3-8584-77A13DDEC770@web.de>

Hi Jose Manuel,

browser-adaptation and proxy-transformation are related, for sure. And  
authors need to be able to switch off both adaptation techniques. I'm  
just not convinced that there must be a single off-switch for the two  

If <meta name="viewport" .../> can be used to switch off browser- 
adaptation and something else (maybe a HTTP header, maybe a handheld  
style sheet) can be used to reliably prevent proxy-transformations,  
wouldn't that be okay as well?

Browser vendors may lay out the argument for why media="handheld" does  
not switch off browser adaptation. What I can say, is that meta/ 
viewport does seem to work just fine. And that w3 specs may need to  
adjust - and not give wrong advice.


On 11.08.2008, at 16:58, JOSE MANUEL CANTERA FONSECA wrote:

> Hi Timur,
> The problem of not activating client-side, browser-made adaptation  
> seems to be very similar to the problem of announcing that a web  
> page is intended to mobile devices in order not to be "touched" by  
> server-side Content Transformation Proxies. The CT Guidelines spec  
> [1] advocates, among others, the usage of <link rel="alternate"  
> media="handheld"> mechanisms to announce it.
> I think W3C needs to provide a unique solution to the problem and  
> not to suggest different mechanisms in different specs.
> I'm ccing the BP group mailing list
> Best Regards
> [1] http://www.w3.org/TR/2008/WD-ct-guidelines-20080801/
> -----Mensaje original-----
> De: public-cdf-request@w3.org [mailto:public-cdf-request@w3.org] En  
> nombre de Timur Mehrvarz
> Enviado el: miércoles, 06 de agosto de 2008 16:56
> Para: public-cdf@w3.org
> Asunto: WICD Core 10.0: Intended Layout
> WICD Core 10.2 "Style sheet being provided for specific agent classes"
> says:
>   A user agent that discovers a CSS style sheet, provided for its own
> device
>   class, should assume the content was created with specific
> properties "in
>   mind". The agent is then expected to deactivate any custom  
> adaptation
>   techniques (for example rendering wide screen content on a narrow
> screen)
>   and display the intended layout "as is".
>   http://www.w3.org/TR/WICD/#intended-layout-1
> When creating content for small screen devices, the ability to tell
> user agents to _not_ activate any adaptation techniques is
> indispensable.
> MobileSafari and Opera Mobile support this now - but differently. Both
> agents support the  <meta name="viewport" content="...">  element in
> HTML as described here:
> http://developer.apple.com/documentation/AppleApplications/Reference/SafariWebContent/UsingtheViewport/chapter_4_section_5.html
> As a consequence, I request an update to WICD Core 10.2 and 10.3, so
> that the desired functionality does not anymore depend on the use of
> style sheets, but the meta/viewport element. The existing
> specification on developer.apple.com, refers to the iPhone only and it
> also does not specify the meta element for use in XHTML. It would be
> good to have a w3 rewrite of this functionality.
> Since two vendors support the desired behaviour already, two more
> fields in the WICD testsuite could go straight from red to green.
> Timur
Received on Wednesday, 13 August 2008 08:59:46 UTC

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