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Re: Checkpoint 2.2: For presentations only?

From: Jon Gunderson <jongund@uiuc.edu>
Date: Tue, 23 Jan 2001 16:01:07 -0600
Message-Id: <>
To: Ian Jacobs <ij@w3.org>, w3c-wai-ua@w3.org
I think the new proposed checkpoint is better.


At 01:18 PM 1/23/2001 -0500, Ian Jacobs wrote:
>In the 16 Jan 2001 version of the Guidelines [1],
>checkpoint 2.2 reads:
>     2.2 For a presentation that requires user input within
>         a specified time interval controlled by the user agent,
>         allow the user to configure the user agent to pause
>         the presentation automatically and await user input
>         before proceeding.
>I am working on an action item with Eric to improve
>the definition of "presentation". In reviewing checkpoint
>2.2, I had the following ideas.
>1) I feel like checkpoint 2.2 may be unnecessarily
>    bound to the term "presentation":
>  - We don't have a rock-solid definition of "presentation"
>    Right now, the definition suggests synchronized multimedia.
>  - I believe that this checkpoint covers more than just
>    synchronized multimedia presentations.
>2) Checkpoint 2.2 is clearly about content that depends
>on time. This implies that that there may be different
>user interactions possible over the course of time, and
>the checkpoint should be sure to allow that (notably
>for consistency with checkpoint 2.5 to respect synchronization
>cues). A user agent should not satisfy checkpoint 2.2 by
>removing all time-dependencies; it should only satisfy
>checkpoint 2.2 by pausing when user input is required and
>resuming thereafter. Thus, content might evolve for one minute,
>then pause indefinitely for user interaction, then resume
>another minute, then pause indefinitely, etc.
>Please consider this rewrite (that includes a couple
>of other simplifications as well) to take into account
>these two points:
>2.2 For content that requires user input within a
>time interval controlled by the user agent, allow
>configuration to make the time interval "infinite"
>(i.e., pause automatically at the beginning of each
>time interval where user input is required,
>and resume automatically at the completion of user
>  - Ian
>[1] http://www.w3.org/WAI/UA/WD-UAAG10-20010116/
>Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
>Tel:                         +1 831 457-2842
>Cell:                        +1 917 450-8783

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Division of Rehabilitation - Education Services
College of Applied Life Studies
University of Illinois at Urbana/Champaign
1207 S. Oak Street, Champaign, IL  61820

Voice: (217) 244-5870
Fax: (217) 333-0248

E-mail: jongund@uiuc.edu

WWW: http://www.staff.uiuc.edu/~jongund
WWW: http://www.w3.org/wai/ua
Received on Tuesday, 23 January 2001 16:59:14 UTC

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