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Alternative Versions

From: Gregg Vanderheiden <gv@trace.wisc.edu>
Date: Thu, 09 Aug 2007 00:44:46 -0500
To: w3c-wai-gl@w3.org
Message-id: <000001c7da48$65259210$146fa8c0@NC84301>
We have a meeting tomorrow to discuss the Alternate Versions question (see
editors note in last WCAG draft)


We have made several suggestions for solutions.


Here is one more that pulls together the latest discussions I think.



1)        A page does not conform if it has an Alternate Version.  If the
page doesn't conform, then it doesn't conform.

2)        A conformance claim can be made for a range of URIs if all of the
pages in that range either conform or have an alternate version that does
conform that can be found from an conforming mechanism such as a link on the
non-conforming page or if the conforming page can be loaded in a
programmatically determined manner from the URI of the non-conforming page.



This would get us out of our current contradiction of saying a page conforms
that doesn't meet the success criteria (as long as there is a page that


This would ensure that the conforming version could be found from the
non-conforming version. 


As AT support for different techniques for finding the conforming page from
the non-conforming page is implemented, it would allow those techniques to
be used (but not before). 




This would seem to address the major issues we had discussed.


The only possible remaining one would be:  Are there sufficient
"programmatically determined" methods at this time to give authors freedom
to use techniques where the non-conforming content cannot contain any
conforming links or other conforming mechanisms for calling up the
conforming version.     We can discuss this one - and perhaps address it by
ensuring that there is sufficient AT support for enough techniques before
this goes to recommendation. 



Please think in advance of meeting of any situations where conforming
methods cannot be integrated into the non-conforming pages for pulling up
the conforming pages.   So we have these at hand for the discussion and
problem solving session. 


And think about this proposal.






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/> FAX 608/262-8848  

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Received on Thursday, 9 August 2007 05:44:59 UTC

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