W3C home > Mailing lists > Public > public-html-a11y@w3.org > March 2010

Re: summarization information delivery options: attribute or element

From: Shelley Powers <shelleypowers@burningbird.net>
Date: Mon, 01 Mar 2010 21:29:46 -0600
Message-ID: <4B8C862A.60405@burningbird.net>
To: John Foliot <jfoliot@stanford.edu>
CC: 'Joshue O Connor' <joshue.oconnor@cfit.ie>, 'Laura Carlson' <laura.lee.carlson@gmail.com>, 'Gez Lemon' <g.lemon@webprofession.com>, "'Gregory J. Rosmaita'" <oedipus@hicom.net>, public-html-a11y@w3.org

>> Regardless of my understanding of this second table summary, the idea of
>> redefining the existing element (caption), including its default
>> behavior and relationship to the html table, breaks backwards
>> compatibility. You can check with Henri to confirm this, if you wish.
> Backwards compatibility with what? Breaks how? Ask Henri to confirm what
> exactly? (I really don't understand what you are referring to here -
> honest).

I'm still working through the rest of your email, but HTML4 specifically 
states that HTML tables can only have one, and only one caption element. 
I believe that Leif is talking about adding a second caption element. 
Though technically not a _new_ element [1], using two captions on a 
table is not, I believe, an enhancement that will degrade gracefully 
with older user agents.

Firefox doesn't print out the second caption, as Leif states in his 
change proposal, but that's not a behavior we can count on. Opera does 
print out the second caption. Safari and Chrome do not. IE does. NVDA 
says one caption when the page is loaded in Firefox. NVDA says both 
captions, when the page is loaded in IE.

The results we will get for a second caption are unreliable.

> JF


[1] http://lists.w3.org/Archives/Public/public-html/2010Feb/0637.html
Received on Tuesday, 2 March 2010 03:30:26 UTC

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