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Re: Fwd: Re: Part II: Issues raised during Mac IE evaluation of UAAG 1.0

From: David Poehlman <poehlman1@comcast.net>
Date: Wed, 03 Apr 2002 11:17:32 -0500
To: Jon Gunderson <jongund@uiuc.edu>
Cc: w3c-wai-ua@w3.org
Message-id: <00c801c1db2b$0f6b9530$19e03244@CP286066A>
that not withstanding, defaults should not thwart accessibility?

----- Original Message -----
From: "Jon Gunderson" <jongund@uiuc.edu>
To: "David Poehlman" <poehlman1@comcast.net>
Cc: <w3c-wai-ua@w3.org>
Sent: Wednesday, April 03, 2002 11:18 AM
Subject: Re: Fwd: Re: Part II: Issues raised during Mac IE evaluation of
UAAG 1.0


We have lots of requirements for control, and we have a P1 requirement
(checkpoint 12.2) that the documentation provide information on how to
make
these adjustments.

Jon


At 11:05 AM 4/3/2002 -0500, David Poehlman wrote:
>if the default is something I cannot use, how do I know to adjust it?
>
>----- Original Message -----
>From: "Ian B. Jacobs" <ij@w3.org>
>To: "Jon Gunderson" <jongund@uiuc.edu>
>Cc: <w3c-wai-ua@w3.org>
>Sent: Wednesday, April 03, 2002 4:15 AM
>Subject: Re: Fwd: Re: Part II: Issues raised during Mac IE evaluation
of
>UAAG 1.0
>
>
>Jon Gunderson wrote:
>
> >
> >> Date: Tue, 02 Apr 2002 17:34:35 -0600
> >> To: "Ian B. Jacobs" <ij@w3.org>
> >> From: Jon Gunderson <jongund@uiuc.edu>
> >> Subject: Re: Part II: Issues raised during Mac IE evaluation of
UAAG
>1.0
> >>
> >> By requiring something other than color it will make the
information
> >> much more salient to the user.  If I can't see colors or
distinguish
> >> them easily, I need something else to determine that this element
is
> >> different from the elements that are around it.
>
>
>But note that the requirement is about the *default* highlight
>and not the highlight mechanism in general.
>
>We don't have a requirement that says "Provide at least one
>non-color highlight style." It's framed in terms of the default
>style. Is there a (P1) reason why the default style can't be color
>if there's an alternative mechanism?
>
>In checkpoint 10.3, we require that 5 values differ in presentation.
>Suppose that someone could only use black and white.
>That would mean that,f or example, the user agent could use black
>text on white background for ordinary text, reverse video for
>selection, and would need three other mechanisms for the other
>three values (focus, fee links, recently visited links). This could
>be done with lines (e.g., underline, boxes, and overlines). This
>is really the extreme case where a visual user is only capable of
>using black and white. Does this happen in practice? As soon as
>the user can use a few more color combinations, then the requirement
>for underlines and boxes goes away as a P1 requirement.
>
>I can't find any argument to justify the requirement as is since
>it's tied to the *default* presentation. I think that the 5 values
>can be rendered using color by default, but as long as the user can
>override the colors, the user should be ok (at a P1 level). It's
>possible that there should be a requirement for rendering styles
>not based on foreground and background colors for those people who
>can only use black, white, and a few more colors. If this is not
>a real requirement, then I have a hard time justifying a P1
>requirement for styles other than colors.
>
>I note that browsers already provide non-color highlight mechanisms
>for some of the values (e.g., links are underlined). But UA
>and operating environment conventions do not force non-color
>highlight mechanisms by default for all five values. And I don't
>think we should require that they do.
>
>   _ Ian
>
>
>--
>Ian Jacobs (ij@w3.org)   http://www.w3.org/People/Jacobs
>Tel:                     +1 718 260-9447

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Division of Rehabilitation - Education Services
MC-574
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 Wednesday, 3 April 2002 11:18:02 GMT

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