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[informative] issue 707 - example 3 of guideline 3.4 (13 July expiry)

From: Wendy A Chisholm <wendy@w3.org>
Date: Tue, 29 Jun 2004 18:52:20 -0400
Message-Id: <5.2.0.9.2.20040629125641.02191b48@localhost>
To: w3c-wai-gl@w3.org

At the 27 May telecon [0] we decided to send informative, editorial issues 
[1] to the mailing list with a 2 week expiration date.  If there is no 
objection and/or no discussion on the list by 13 July 2004, the following 
proposal will be incorporated into the next working draft of WCAG 2.0.  If 
you agree with the proposal, you do not need to respond.

[0] <http://www.w3.org/2004/05/27-wai-wcag-irc.html#T21-20-41>
[1] informative, editorial issues: do not effect wording of normative 
statements. Ideally, we will resolve these issues through mailing list 
discussion and reserve Thursday telecons for normative text and complex issues.

This is a rewrite of Mike's proposal for issue 707.  I attempted to make 
the style consistent with other examples. 
<http://trace.wisc.edu/bugzilla_wcag/show_bug.cgi?id=707>

Proposed text:
Example 3: a site that alters navigation history
A user agent tracks the path a user takes through a Web site and makes the 
history available to the user via the back button.  If the site author 
alters the navigation history or prevents the user agent from adding the 
current page to the history, when a user presses the back button the result 
is unpredictable.
end of proposal.

History of this issue:
Greg Lowney writes:
64.     Guideline 3.4, Example 3: "frames that do not track history
making the back button behave unexpectedly"
64.a.    [MEDIUM PRIORITY] This doesn't describe a recommendation; is it
simply to avoid frames? (Again, it seems like UA should be able to solve
this problem without changes to Web sites.)

Mike's proposal at: 
http://lists.w3.org/Archives/Public/w3c-wai-gl/2004AprJun/0203.html
Example 3: preserve navigational history
If UA supports navigaional history content author should not alter the
history nor should they prevent the current page from being added to the
history collection as these actions would make navigation unpredictable.

-- 
wendy a chisholm
world wide web consortium
web accessibility initiative
http://www.w3.org/WAI/
/--  
Received on Tuesday, 29 June 2004 18:52:35 GMT

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