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Revised 1.1.1

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Wed, 1 Nov 2006 16:33:34 -0600
To: <w3c-wai-gl@w3.org>
Message-ID: <006301c6fe05$c4e9dc30$8c17a8c0@NC84301>
At the meeting, a problem regarding 1.1.1 was highlighted


Basically it used to say that non-text content that too user input needed to
have a text equiv that carried out the same function.   We could not figure
out how text could substitute for content that took user input. 


A subcommittee met to work on this 


Here is the proposed revised wording for 1.1.1


(The committee felt that "identifying the purpose" was different than a
"descriptive label" so the end of the first clause was not combined with the
second. )  (e.g.  a magnifying glass icon for a search function would have
"search" which identifies its purpose rather than "Magnifying glass" which
is a descriptive text label for the icon (which is the non-text content). 



Level 1 Success Criteria for Guideline 1.1 

1.1.1 Non-text Content: For all non-text content
<http://www.w3.org/WAI/GL/WCAG20/#non-text-contentdef> , one of the
following is true: How
tml#text-equiv-all>  to meet 1.1.1

*	General Non-text Content: If non-text content presents information
that can be presented in text, then text alternatives
<http://www.w3.org/WAI/GL/WCAG20/#text-altdef>  presents the same
information as the non-text content. If the information cannot be presented
in text or the non-text content accept user input, then text alternatives at
least identify the purpose of the non-text content.
*	Special Cases Label Only: If non-text content is 

*	multimedia <http://www.w3.org/WAI/GL/WCAG20/#multimediadef> , 
*	live audio-only
<http://www.w3.org/WAI/GL/WCAG20/#live-audio-onlydef>  or live video-only
<http://www.w3.org/WAI/GL/WCAG20/#live-video-onlydef>  content, 
*	a test or exercise that must be
<http://www.w3.org/WAI/GL/WCAG20/#must-nontextdef>  presented in non-text
format , or
*	primarily intended to create a specific sensory
<http://www.w3.org/WAI/GL/WCAG20/#sensoryexpdef>  experience ,

 then text alternatives at least identify the non-text content with a
descriptive text label <http://www.w3.org/WAI/GL/WCAG20/#labeldef> . 
                (For multimedia, see also Guideline 1.2 Provide
<http://www.w3.org/WAI/GL/WCAG20/#media-equiv>  synchronized alternatives
for multimedia.) 

*	Turing Exception: If the purpose of non-text content is to confirm
that content is being operated by a person rather than a computer, then
different forms are provided to accommodate different disabilities.

Decoration-Formatting-Invisible: If non-text content is pure decoration
<http://www.w3.org/WAI/GL/WCAG20/#puredecdef> , or used only for visual
formatting, or if it is not presented to users, then it is implemented such
that it can be ignored by assistive <http://www.w3.org/WAI/GL/WCAG20/#atdef>




Gregg C Vanderheiden Ph.D. 
Professor - Depts of Ind. Engr. & BioMed Engr. 


Received on Wednesday, 1 November 2006 22:34:08 UTC

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