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Re: [Issue 317] Color

From: Marja-Riitta Koivunen <marja@annotea.org>
Date: Sun, 18 Apr 2004 07:19:51 -0400
Message-Id: <5.1.0.14.0.20040418064946.04892dd0@mail.annotea.org>
To: <w3c-wai-gl@w3.org>

At 12:37 AM 4/18/2004 -0500, Gregg Vanderheiden wrote:

>I was assigned the color checkpoints to work on cleanup
>
>They currently read:
>
>LEVEL 1:  Success Criteria for Guideline 1.3
>Any information presented through color is also available without color (for
>example through context or markup or coding that does not depend on color).
>@@issue 317?
>Note:
>
>Color must be interpretable by a user agent so that the user doesn't have to
>look at markup to determine meaning.
>
>LEVEL 2:  Success Criteria for Guideline 1.3
>Information presented using color is also available without color and
>without having to interpret markup (for example through context or text
>coding). @@issue 317 [V]
>
>
>
>ISSUES
>- it is not clear what is meant by code.  It is supposed to mean that you
>mark the materials in a visual fashion that can be viewed without needed
>special user agent or feature.  But coding sounds a lot like markup.
>
>- level 1 should allow markup as solution.  Then level 2 would go further
>and make it directly accessible.
>
>
>POTENTIAL REWORDING
>
>LEVEL 1:  Success Criteria for Guideline 1.3
>Any information presented through color is also available without color (for
>example through markup or context or characters or symbols that accompany
>the color coding) [I]
>
>Note:  If markup is used, markup must be interpretable by a user agent so
>that the user doesn't have to look at markup to determine meaning.

When I read this it is so abstract that I'm not at all sure what it means 
in practise? Not even sure if we are talking about visual presentation? I 
think user agent can interpret color differences better than a user who is 
color blind.

Maybe we should talk first about classifying visual information by using 
class attributes and other means of markup so that it be easily presented 
to the user in different ways.

If color is used for the differentiation, also some other visual coding is 
needed e.g. form, texture, labelling, proximity etc.


>LEVEL 2:  Success Criteria for Guideline 1.3
>Information presented using color is also available without color and
>without having to interpret markup (for example through context or or
>characters or symbols that accompany the color coding).   [V]
>
>Not sure what the difference here is to level 1? Maybe the classification 
>and use of stylesheets should be here and plain visual differentiation at 
>level 1?
>
>Gregg
>
>------------------------
>
>Gregg C Vanderheiden Ph.D.
>Professor - Depts of Ind. Engr. & BioMed Engr.
>Director - Trace R & D Center
>University of Wisconsin-Madison
><http://trace.wisc.edu/> FAX 608/262-8848
>For a list of our listserves http://trace.wisc.edu:8080/mailman/listinfo/
Received on Sunday, 18 April 2004 08:05:51 GMT

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