Re: Proposed clarification to checkpoints 3.3, 3.5, 3.6

The "turn images off" checkpoint covers this case (admittedly at P2).

Is that enough?

Charles McCN

On Mon, 12 Jun 2000, Ian Jacobs wrote:

  Jon Gunderson wrote:
  > 
  > Ian,
  > For some types of cognitive disabilities, people with visual impairments
  > and some types of screen reder and magnification software my  
  > understanding  was that it was important to turn off the
  > rendering or not allow the rendering of video.  
  > Freeze may work for many people, but may not work for
  > all people.  What is the advantage of freezing a frame?
  
  It sounds like there are a couple of requirements:
  1) Stop things from moving
  2) Stop things from being too busy (e.g., don't open
     too many viewports).
  
  But is "don't render content" a requirement? If so, then
  why (still) video content and not graphically rendered
  text? Or graphics? I don't think we have a requirement
  for "make this page less busy" - the closest we get is
  "don't open too many viewports". 
  
  So what are the accessibility requirements surrounding
  video and animation that freezing does not address?
  
   - Ian
  
  > At 10:33 PM 6/9/00 -0400, Ian Jacobs wrote:
  > >Hello,
  > >
  > >Please consider the following editorial clarification to
  > >checkpoints 3.3, 3.5, and 3.6 (of the 7 May draft [1]):
  > >
  > >  3.3 Allow the user to turn on and off rendering of video.
  > >      [Priority 1]
  > >
  > >  3.5 Allow the user to turn on and off animated or
  > >      blinking text. [Priority 1]
  > >
  > >  3.6 Allow the user to turn on and off animations and
  > >      blinking images. [Priority 1]
  > >
  > >After discussion with Charles and Eric Hansen about
  > >these checkpoints, we concluded that the requirement
  > >was to "freeze" video and animations. The term
  > >"turn on and off" may be construed to mean "do not
  > >render at all" but I don't believe that is the requirement
  > >expressed by these checkpoints. The accessibility problem
  > >in these cases (unless I am mistaken) arises from the
  > >distraction of the motion, not the mere rendering of
  > >the visual information. We do have a P2 checkpoint
  > >about turning off the rendering of images (checkpoint 3.9).
  > >Therefore, I propose using the term "freeze" instead
  > >of "turn on and off" for these three checkpoints.
  > >
  > >  - Ian
  > >
  > >
  > >[1] http://www.w3.org/WAI/UA/WD-UAAG10-20000507
  
  -- 
  Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
  Tel:                         +1 831 457-2842
  Cell:                        +1 917 450-8783
  

--
Charles McCathieNevile    mailto:charles@w3.org    phone: +61 (0) 409 134 136
W3C Web Accessibility Initiative                      http://www.w3.org/WAI
Location: I-cubed, 110 Victoria Street, Carlton VIC 3053
Postal: GPO Box 2476V, Melbourne 3001,  Australia

Received on Monday, 12 June 2000 18:19:46 UTC