Fwd: additional sentence for 204

FYI.

Begin forwarded message:

> Resent-From: public-html@w3.org
> From: Edward O'Connor <eoconnor@apple.com>
> Subject: Re: additional sentence for 204
> Date: September 24, 2012 5:02:08 PM PDT
> To: public-html@w3.org
> 
> Hi,
> 
> Since my initial response to bug 18952 [1], a couple of loose ends from
> the various ISSUE-204 threads were identified in Bugzilla, and I've
> attempted to address them in this commit:
> 
> https://github.com/w3c/html/commit/4ff4723623375c46a8c1d76af637551a8a3868c8
> 
> As always, if there are additional issues in the current spec text,
> please let me know, either by filing a bug or mailing public-html.
> 
> Summary of changes:
> 
> 1) I removed the <map> example that Leif found to be problematic.
> 
> 2) I attempted to include the clarification requested by Janina. I based
> this on James' suggested text [2], but ended up with something a bit
> different.
> 
> 3) and I rearranged things a bit.
> 
> James suggested:
> 
>> Note: Only hidden="" elements that are referenced indirectly by a
>> unique identifier (ID) reference or valid hash-name reference may have
>> their structure and content exposed upon user request.
> 
> I believe I captured this restriction by changes to the "When such
> features are available" paragraph:
> 
> "When such features are available, User Agents may use them to expose
> the full semantics of hidden elements to AT when appropriate, if such
> content is referenced indirectly by an ID reference or valid hash-name
> reference. This allows ATs to access the structure of these hidden
> elements upon user request, while keeping the content hidden in all
> presentations of the normal document flow."
> 
> I don't think the above gives UAs permission to use such an AAPI feature
> for anything but hidden="" elements that are indirectly referenced, so I
> think this covers Janina's concern. Janina?
> 
> James continued:
> 
>> Authors desiring to prevent user-initiated viewing of hidden=""
>> elements should remove identifier (ID) or hash-name references to the
>> element.
> 
> This part survived with only minor revision:
> 
> "Authors who wish to prevent user-initiated viewing of a hidden element
> should not reference the element with such a mechanism."
> 
> 
> Thanks,
> Ted
> 
> 1. https://www.w3.org/Bugs/Public/show_bug.cgi?id=18952
> 2. http://lists.w3.org/Archives/Public/public-html-a11y/2012Sep/0143.html
>