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Re: Integration of HTM

From: Richard Schwerdtfeger <schwer@us.ibm.com>
Date: Thu, 4 Feb 2010 10:57:49 -0700
To: Maciej Stachowiak <mjs@apple.com>
Cc: Anne van Kesteren <annevk@opera.com>, Ian Hickson <ian@hixie.ch>, Jonas Sicking <jonas@sicking.cc>, "public-html@w3.org" <public-html@w3.org>
Message-ID: <OF3F9527CC.2EE42C84-ON862576C0.00621CF7-862576C0.0062AD0C@us.ibm.com>

Correct. And that is why we want to introduce the ability to select
alternative UIs through style sheets to different users.

However, many users want to be able to use the canvas implementation
directly, where possible so that they may operate side by side their
no-impaired user. This is what <accessible> is for.

Authors have the choice of having a UI that renders fallback content in the
place of <accessible>. That will require the fallback content to ensure a
visual rendering of the content using standard HTML and CSS but that is no
different than how you would expect fallback content to perform - although
the fallback content may not represent the same UI and content structure
that is reflected in canvas, unlike <accessible>, as its purpose is to
simply to provide equivalent capability just as is intended for a browser
which does not support canvas.

Rich

Rich Schwerdtfeger
Distinguished Engineer, SWG Accessibility Architect/Strategist


                                                                           
             Maciej Stachowiak                                             
             <mjs@apple.com>                                               
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             02/04/2010 11:03          Richard                             
             AM                        Schwerdtfeger/Austin/IBM@IBMUS      
                                                                        cc 
                                       Anne van Kesteren                   
                                       <annevk@opera.com>, Ian Hickson     
                                       <ian@hixie.ch>, Jonas Sicking       
                                       <jonas@sicking.cc>,                 
                                       "public-html@w3.org"                
                                       <public-html@w3.org>                
                                                                   Subject 
                                       Re: Integration of HTM              
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





On Feb 4, 2010, at 8:50 AM, Richard Schwerdtfeger wrote:



      Anne,

      Seeing as you don't think people to need to hire consultants, I need
      you to make this directly accessible to a person with:

      - a cognitive impairment
      - a person with dyslexia
      - a user with RP
      - a mobility impaired user

      http://www.nysubway.com/map/

      Please enlighten us.


The map at that link does not use <canvas>. There are definitely challenges
of making interactive map content accessible to a wide range of audiences.
But this example shows that the mechanisms we invent for this should *not*
be specific to <canvas>. They need to be approaches that work for all HTML.

Regards,
Maciej




      Rich


      Rich Schwerdtfeger
      Distinguished Engineer, SWG Accessibility Architect/Strategist

      <graycol.gif>"Anne van Kesteren" ---02/04/2010 03:35:51 AM---On Thu,
      04 Feb 2010 02:49:56 +0100, Ian Hickson <ian@hixie.ch> wrote:
                                                                           
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                                              "Jonas Sicking" <?           
                                              jonas@sicking.cc>, "?,       
                                              public-html@w3.org" <        
                                              public-html@w3.org>          
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                                              Re: Integration of HTM       
                                                                           
                                                                           
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      On Thu, 04 Feb 2010 02:49:56 +0100, Ian Hickson <ian@hixie.ch> wrote:
      > On Wed, 3 Feb 2010, Richard Schwerdtfeger wrote:
      >> We are calling it the accessible DOM for canvas. It starts and
      ends with
      >> the <accessible></accessible> tags and it is not visually
      rendered.
      >
      > I really don't think this is a good idea, as explained in the
      following
      > e-mails:
      >
      >
      http://lists.w3.org/Archives/Public/public-html/2010Jan/0488.html
      >
      http://lists.w3.org/Archives/Public/public-html/2010Jan/1151.html
      >
      http://lists.w3.org/Archives/Public/public-html/2010Jan/0931.html
      >
      > I do not think it is necessary to have multiple inline alternatives
      for
      > <canvas>, nor do I think it is necessary for widgets that represent
      the
      > graphically-rendered widgets on a <canvas> to be marked up
      separately
      > from an inline alternative representation. The existing features of
      HTML
      > already allow us to have multiple alternatives. Adding more
      features for
      > this is IMHO a mistake.

      I wholeheartedly agree. Making accessibility into something that only

      consultants can do correctly would be a huge step backwards.


      --
      Anne van Kesteren
      http://annevankesteren.nl/.



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Received on Thursday, 4 February 2010 17:58:40 GMT

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