W3C home > Mailing lists > Public > public-html-a11y@w3.org > March 2012

Re: Drop longdesc, get aria-describedat?

From: Steve Faulkner <faulkner.steve@gmail.com>
Date: Mon, 12 Mar 2012 11:20:42 +0000
Message-ID: <CA+ri+V=5y=uriYSA351=+9jL5MzejQxLAEkupEH8pyQLFNfkfg@mail.gmail.com>
To: Laura Carlson <laura.lee.carlson@gmail.com>
Cc: W3C WAI-XTECH <wai-xtech@w3.org>, HTML Accessibility Task Force <public-html-a11y@w3.org>, "Michael(tm) Smith" <mike@w3.org>, Janina Sajka <janina@rednote.net>, Judy Brewer <jbrewer@w3.org>
Hi Laura,

you wrote:

"A warning for a proper longdesc is simply wrong. People should not be
reprimanded for doing the right thing. On the contrary, they should be
applauded."

the details element is an example of a conforming HTML5 feature that
triggers a warning in the http://validator.w3.org/nu/

"*Warning*: The details element is not supported properly by browsers yet.
It would probably be better to wait for implementations."

If longdesc becomes conforming in HTML5, I would strongly favour a warning
to inform developers of its lack of support.

regards
Stevef


On 8 March 2012 18:06, Laura Carlson <laura.lee.carlson@gmail.com> wrote:

> Hi Steve,
>
> > "My druthers would be to accept longdesc right away and call it obsolete
> > but conforming. That clearly signals that a replacement is expected
> > while providing needed functionality right away--the same it has been
> > available since html 4. As I said, this is my
> > preference. Others may have other views."
> >
> > I  find that to be an acceptable compromise.
>
> First, two references:
>
> 1. Regarding conforming but with a warning the HTML Chairs' Decision
> on ISSUE-30, stated:
> "The weakest proposal was the one that makes longdesc conforming but
> with a warning...there was a strong argument which is unique to this
> proposal: if longdesc is conforming, user agents will be required to
> support it; if there is a validator warning, users will be discouraged
> from using it. This combination is the worst of all possibilities.
> Eliminating this proposal early made the process of coming to a
> resolution simpler." [1]
>
> 2. Obsolete but conforming features trigger HTML5 warnings with advice
> to use a specific and different solution. [2]
>
> Now, why obsolete but conforming is unacceptable to me:
>
> A warning for a proper longdesc is simply wrong. People should not be
> reprimanded for doing the right thing. On the contrary, they should be
> applauded.
>
> It has been substantially evidenced via the documentation of over
> fourteen hundred real world examples of longdesc that authors do
> indeed use this attribute in practice to improve accessibility. This
> is a non-negligible number of examples that utilize longdesc in
> meaningful ways. All of the images in those examples would be
> significantly less accessible (some even totally inaccessible) without
> it.
>
> Breaking both compatibility with existing best practice (and
> documentation of the same), as well as requiring a wide range of
> tools, content, and authoring guidance to be updated in order to
> achieve compatibility with a replacement for longdesc - for something
> meant to solve the SAME problem, is an intolerable cost. It would be
> an illogical undue burden and unacceptable to authors and
> organizations that have already made investments in the use of
> longdesc.
>
> Longdesc solves problems and makes things better. Other proposed
> solutions do not meet requirements and do not have an existing
> critical support base of tools and educational materials.
>
> Longdesc strengthens the language. Other techniques are either
> nonexistent, retrograde, or makeshift substitutes that do not directly
> provide the valuable semantics and critical backwards compatibility
> that longdesc does. No better technical solution exists.
>
> People with disabilities would be the losers if longdesc were made
> obsolete but conforming. It would be an unnecessary atrocity on
> authors and users with disabilities.
>
> Best Regards,
> Laura
>
> [1]
>
> http://lists.w3.org/Archives/Public/public-html/2010Aug/att-0112/issue-30-decision.html
> [2]
> http://www.w3.org/TR/html5/obsolete.html#obsolete-but-conforming-features
>
>
> --
> Laura L. Carlson
>



-- 
with regards

Steve Faulkner
Technical Director - TPG

www.paciellogroup.com | www.HTML5accessibility.com |
www.twitter.com/stevefaulkner
HTML5: Techniques for providing useful text alternatives -
dev.w3.org/html5/alt-techniques/
Web Accessibility Toolbar - www.paciellogroup.com/resources/wat-ie-about.html
Received on Monday, 12 March 2012 11:21:35 UTC

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