W3C home > Mailing lists > Public > w3c-wai-gl@w3.org > January to March 2006

RE: perceivable structures

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Wed, 22 Feb 2006 15:30:02 -0600
To: "'Loretta Guarino Reid'" <lguarino@adobe.com>, "'WCAG'" <w3c-wai-gl@w3.org>
Message-ID: <01c001c637f7$248ce0e0$ee8cfea9@NC6000BAK>
Hi Loretta,

 

Late me take a crack at these two.

 

RE DEFAULT

The default presentation is what most users get when they go to the site for
the first time with a browser that is set up in the form it comes when you
install it.  (e.g. no user preferences set).

 

 RE: There may be relationship that appear in the default presentation that
don't have to be perceived to understand the content

 

 If they author presents the relationships to most users (even if not all
need them all) then the relationships should be provided for all.   They are
information - therefore they should be perceivable even if view not using
the expected/standard/default means for viewing.  

 

 

Make sense? 


Gregg

 -- ------------------------------ 
Gregg C Vanderheiden Ph.D. 
Professor - Ind. Engr. & BioMed Engr.
Director - Trace R & D Center 
University of Wisconsin-Madison 
The Player for my DSS sound file is at http://tinyurl.com/dho6b
<http://tinyurl.com/cmfd9>  

 

 


  _____  


From: Loretta Guarino Reid [mailto:lguarino@adobe.com] 
Sent: Wednesday, February 22, 2006 9:44 AM
To: Gregg Vanderheiden; WCAG
Subject: Re: perceivable structures

When we wrestled with this, the proposed definition had problems because

1.	It isn't well defined what the default presentation is 
2.	There may be relationship that appear in the default presentation
that don't have to be perceived to understand the content


An example of the latter would be structural information in an image, where
the information is communicated via alternate text.

Loretta

On 2/22/06 12:28 AM, "Gregg Vanderheiden" <gv@trace.wisc.edu> wrote:

This definition seems backward.
 
perceivable structures 
 
relationships in the content that are necessary to perceive the organization
of the content.
 
 
I think it needs to be
 
 
perceivable structures 
 
relationships in the content that can be perceived from the default
presentation.
 
 
 
RATIONALE
 
What we are trying to achieve is to make sure that any relationships that
are obvious from the presentation - are also obvious when looking at the
markup.  
 
Yes? 
 
 

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/  <http://trace.wisc.edu/> <http://trace.wisc.edu/> >
FAX 608/262-8848  
For a list of our list discussions http://trace.wisc.edu/lists/
The Player for my DSS sound file is at http://tinyurl.com/dho6b 
   <http://trace.wisc.edu:8080/mailman/listinfo/>
<http://trace.wisc.edu:8080/mailman/listinfo/> 


 

 
Received on Wednesday, 22 February 2006 21:30:14 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Monday, 7 December 2009 10:47:42 GMT