- From: Steven Faulkner <faulkner.steve@gmail.com>
- Date: Tue, 13 Jul 2010 22:31:40 +0100
- To: "Gregory J. Rosmaita" <oedipus@hicom.net>
- Cc: Laura Carlson <laura.lee.carlson@gmail.com>, public-html-a11y@w3.org
- Message-ID: <AANLkTimtjTI8ZFL-uYxAAnxw4XDo0oXZ3w2EXvd1Bh0r@mail.gmail.com>
Hi Gregory, > my thoughts on FIGCAPTION, @alt and @labelledby have changed since then can you explain what the changes in your views are? regards Steve On 13 July 2010 21:13, Gregory J. Rosmaita <oedipus@hicom.net> wrote: > > aloha, steve! > > thanks for the reply -- apologies for not replying sooner... > > yes, i was part of that consensus building, but my thoughts on > FIGCAPTION, @alt and @labelledby have changed since then to those > i articulated in the post to which this post is threaded, just as > HTML5 has materially changed since the consensus you referenced > was recorded/submitted, gregory. > ---------------------------------------------------------------- > CONSERVATIVE, n. A statesman who is enamored of existing evils, > as distinguished from the Liberal, who wishes to replace them > with others. -- Ambrose Bierce, _The Devil's Dictionary_ > ---------------------------------------------------------------- > Gregory J. Rosmaita, oedipus@hicom.net > Camera Obscura: http://www.hicom.net/~oedipus/index.html > ---------------------------------------------------------------- > > > ---------- Original Message ----------- > From: Steven Faulkner <faulkner.steve@gmail.com> > To: "Gregory J. Rosmaita" <oedipus@hicom.net> > Cc: Laura Carlson <laura.lee.carlson@gmail.com>, public-html-a11y@w3.org > Sent: Fri, 9 Jul 2010 07:55:46 +0100 > Subject: Re: FIGCAPTION, @alt, and @labelledby: 3 issues > > > Hi Gregory, > > > > >ISSUE 1: i have a major objection to equating FIGCAPTION with @alt or > > aria-labelledby > > > > In the 'WAI CG Consensus Resolutions on Text alternatives in > > HTML 5' document [1] it was agreed that for HTML5 conformance: > > > > <img> is only valid when at least one of the following is true: > > > > - @alt is present (empty or non-empty) *OR* > > - @aria-labelledby is present (non-empty only) *OR* > > - the <img> is located within a <figure> that has a non-empty > > <figcaption>* OR* > > > > - @role="presentation" > > > > The above has been around for a year or so and has been > > discussed, and I was under the impression that you were involved > > in the discussions that resulted in the consensus doc. > > > > Is what laura has proposed substantially different to the > > consensus doc or have you changed your views on it? > > > > [1] http://www.w3.org/2009/06/Text-Alternatives-in-HTML5.html > > > > regards > > steve > > > > On 8 July 2010 15:27, Gregory J. Rosmaita <oedipus@hicom.net> wrote: > > > > > aloha, laura! > > > > > > three issues arising from a review of the materials you so expertly > > > compiled at: > > > > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Jul/0028.html > > > > > > ISSUE 1: i have a major objection to equating FIGCAPTION with @alt > > > or aria-labelledby -- as a content developer, i would like to be able > > > to use FIGCAPTION as a caption for an image or a collection of > > > images, in the way that LEGEND functions for FIELDSET > > > > > > <figure> > > > <figcaption>Four Stages of a Butterfly's Life</figcaption> > > > <img alt="egg" src="bf1.png" longdesc="bf1.html"> > > > <img alt="larva" src="bf2.png" longdesc="bf2.html"> > > > <img alt="pupa" src="bf3.png" longdesc="bf3.html"> > > > <img alt="adult" src="bf4.png" longdesc="bf4.html"> > > > </figure> > > > > > > specifying either @alt or FIGCAPTION be used eliminates this > > > possibility -- there has been discussion on this topic (associating > > > multiple images with a single caption that describes the group) > > > which became bifurcated due to my having initially cross-posted > > > the emessage to wai-xtech as well as public-html-a11y: > > > > > > start: > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Jun/0142.html > > > > > > reply thread 1: > > > * > http://lists.w3.org/Archives/Public/public-html-a11y/2010Jun/0143.html > > > * > http://lists.w3.org/Archives/Public/public-html-a11y/2010Jun/0144.html > > > > > > reply thread 2: > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0010.html > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0011.html > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0012.html > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0013.html > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0015.html > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0016.html > > > * http://lists.w3.org/Archives/Public/wai-xtech/2010Jun/0019.html > > > > > > > > > ISSUE 2: i support the use of aria-labelledby as a valid substitute for > > > @alt ONLY if @labelledby is introduced into HTML5 as a "naked" > > > attribute (that is, without the aria- prefix) -- content providers > > > cannot count on ARIA support to provide such a fundamental feature > > > as a terse textual descriptor of an image nor should they -- this is > > > a case where native solutions MUST be available to content developers > > > > > > > > > ISSUE 3: i support use of aria-describedby as a valid substitute for > > > LONGDESC if, and ONLY if, @describedby is incorporated into HTML5 > > > as a "naked" attribute (again, without the aria- prefix) -- content > > > providers and users cannot count on ARIA support -- NOR SHOULD THEY -- > > > if a native HTML5 solution is available... therefore, naked > > > @labelledby and @describedby are the only realistic alternatives to > > > use of @alt and LONGDESC > > > > > > gregory. > > > ------------------------------------------------------------------- > > > Trouble sharpens the vision. In our moments of distress we can see > > > clearly that what is wrong with this world of ours is the fact that > > > Misery loves company and seldom gets it. -- P.G. Wodehouse > > > ------------------------------------------------------------------- > > > Gregory J. Rosmaita, oedipus@hicom.net > > > Camera Obscura: http://www.hicom.net/~oedipus/ > > > Oedipus' Online Complex: http://my.opera.com/oedipus/ > > > ------------------------------------------------------------------- > > > > > > ---------- Original Message ----------- > > > From: Laura Carlson <laura.lee.carlson@gmail.com> > > > To: HTML Accessibility Task Force <public-html-a11y@w3.org> > > > Cc: Sam Ruby <rubys@intertwingly.net>, Paul Cotton > > > <Paul.Cotton@microsoft.com>, Maciej Stachowiak <mjs@apple.com> > > > Sent: Thu, 8 Jul 2010 06:37:07 -0500 > > > Subject: Re: Add rationale or exclude role="presentation", > > > aria-labelledby & aria-labelled attributes from alt change > proposal? > > > Help needed. (was Re: ISSUE-31 Change Proposal) > > > > > > > On 7/8/10, Maciej Stachowiak <mjs@apple.com> wrote: > > > > > > > > > I believe this satisfies the request for updates. I'll update the > > > > > issue status page. > > > > > > > > Okay. Thank you. > > > > > > > > Again, it anyone on the accessibility task force can supply text > > > > to justify role="presentation" and aria-labelled, please, please > > > > do let me know. > > > > > > > > I would love to add it to the task force endorsed proposal: > > > > http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20090126 > > > > http://lists.w3.org/Archives/Public/public-html/2010May/0033.html > > > > > > > > Kindest Regards, > > > > Laura > > > > > > > > > On Jul 7, 2010, at 7:49 AM, Laura Carlson wrote: > > > > > > > > > >> Hello Everyone, > > > > >> > > > > >> As you know the HTML WG Chairs asked that rationale be provided > for > > > > >> the aria-labelledby and aria-labelled and role="presentation" > options > > > > >> in the alt "Replace img Guidance for Conformance Checkers" Change > > > > >> Proposal [1] for HTML Issue 31. > > > > >> > > > > >> I asked the accessibility task force for help to supply rationale > [2]. > > > > > > > >> > > > > >> To date I have received no response to my inquiry. > > > > >> > > > > >> Maciej asked [3] that I exclude the aria-labelledby and > aria-labelled > > > > >> and role="presentation" options, if I did not add rationale. > > > > >> > > > > >> I have done so in a new change proposal. This proposal allows > <img> > > > > >> only to be valid with <alt> or <figcaption>. This new offering is > at: > > > > >> http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20100707 > > > > >> > > > > >> I did find some bullet points stating advantages for > aria-labelledby > > > > >> in Steve's "HTML5: Techniques for Providing Useful Text > Alternatives" > > > > >> [4]. So I created an additional new change proposal for <img> to > be > > > > >> valid only with <alt> or <figcaption> or aria-labelledby. It is > at: > > > > >> http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20100706 > > > > >> > > > > >> Maciej, Sam, and Paul, please add these two new additional change > > > > >> proposals to the change proposal table for Issue 31 [5]: > > > > >> > > > > >> 1. <img> valid only with <alt> or <figcaption> or aria-labelledby > > > > >> http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20100706 > > > > >> > > > > >> 2. <img> valid only with <alt> or <figcaption> > > > > >> http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20100707 > > > > >> > > > > >> I also added Steve's bullet points to the original (accessibility > task > > > > > > > >> force endorsed) change proposal. [1] > > > > >> > > > > >> If anyone can supply text which delineates rationale for and > > > > >> role="presentation" or labelledby or further/better rationale for > > > > >> aria-labelledby please, please speak up, I would be delighted to > add > > > > >> it to the original proposal and ImgElement20100706. > > > > >> > > > > >> Thank you. > > > > >> > > > > >> Best Regards, > > > > >> Laura > > > > >> > > > > >> [1] > http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20090126 > > > > >> [2] > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Jun/0213.html > > > > >> [3] > http://lists.w3.org/Archives/Public/public-html/2010Jun/0588.html > > > > >> [4] http://www.w3.org/TR/html-alt-techniques/ > > > > >> [5] http://dev.w3.org/html5/status/issue-status.html#ISSUE-031 > > > > >> > > > > >> Related References asking for task force help on Issue 31 change > > > proposal: > > > > >> > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Jan/0310.html > > > > >> > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Feb/0008.html > > > > >> > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Mar/0007.html > > > > >> > > > http://lists.w3.org/Archives/Public/public-html-a11y/2010Apr/0134.html > > > > >> > > > > >> On 6/24/10, Laura Carlson <laura.lee.carlson@gmail.com> wrote: > > > > >>> Hello everyone, > > > > >>> > > > > >>> -public-html > > > > >>> +public-html-a11y > > > > >>> > > > > >>> Maciej has asked [1] for added rationale in the alt change > proposal > > > > >>> for role="presentation", aria-labelledby & aria-labelled > attributes. > > > > >>> > > > > >>> Or else he suggests excluding these three options from the > proposal. > > > > >>> > > > > >>> He has said what we currently have is factual description of what > > > > >>> these mechanisms are and what they do. But we have no reason for > why > > > > >>> the spec should be allowed to omit alt when one of these is > present. > > > > >>> > > > > >>> So should I remove these options? Or does anyone have suggest > text to > > > > > > > >>> add to the proposal to justify these options better? > > > > >>> > > > > >>> The current text in the change proposal states [2]: > > > > >>> > > > > >>> QUOTE > > > > >>> > > > > >>> Added Options which Address Accessibility > > > > >>> > > > > >>> The language of WCAG2 allows a text alternative to be expressed > in > > > > >>> other ways besides the alt attribute. Three cases in particular > > > > >>> distinguish syntax for cases, which yield more accessible > content. > > > > >>> > > > > >>> role="presentation" Attribute > > > > >>> > > > > >>> role="presentation" programmatically conveys to assistive > technology > > > > >>> that an image is presentational and not of interest. > > > > >>> > > > > >>> aria-labelledby and aria-labelled Attributes > > > > >>> > > > > >>> When the natural concise text alternative is available elsewhere > on a > > > > > > > >>> page the aria-labelledby and aria-labelled attributes can be an > > > > >>> accessible alternative for an image as it programmatically > conveys > > > > >>> meaning to assistive technology. For example: > > > > >>> > > > > >>> <h2 id="bronze">Bronze Medal</h2> > > > > >>> <!-- Some page content --> > > > > >>> <img src="bronzemedal.png" aria-labelledby="bronze"> > > > > >>> > > > > >>> UNQUOTE > > > > >>> > > > > >>> All guidance and suggestions greatly appreciated. Thank you. > > > > >>> > > > > >>> Best Regards, > > > > >>> Laura > > > > >>> > > > > >>> [1] > > > http://lists.w3.org/Archives/Public/public-html/2010Jun/0588.html > > > > >>> [2] > > > > >>> > > > > > > > > http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20090126#Added_Options_which_Address_Accessibility > > > > >>> > > > > >>> > > > > >>> On 6/23/10, Maciej Stachowiak <mjs@apple.com> wrote: > > > > >>>> > > > > >>>> On Jun 23, 2010, at 11:30 AM, Laura Carlson wrote: > > > > >>>> > > > > >>>>> Hi Sam, > > > > >>>>> > > > > >>>>> I think/hope that I have now addressed the concerns that you > have > > > > >>>>> raised. > > > > >>>>> I: > > > > >>>>> > > > > >>>>> 1. Added rationale for all changes. > > > > >>>>> 2. Removed the reference to the paragraph-section-heading > loophole, > > > as > > > > >>>>> Ian indeed removed it from the spec per as requested in Bug > 9217. > > > > >>>>> http://www.w3.org/Bugs/Public/show_bug.cgi?id=9217 > > > > >>>>> I just hope it doesn't reappear in the spec. > > > > >>>>> > > > > >>>>> In addition, I updated all three of my current proposals for > Issue > > > 31. > > > > >>>>> So far, all together I have three proposals and possibly a > fourth. > > > > >>>>> They are: > > > > >>>>> > > > > >>>>> 1. Replace img Guidance for Conformance Checkers. January 26, > 2010. > > > > > > > >>>>> > http://www.w3.org/html/wg/wiki/ChangeProposals/ImgElement20090126 > > > > >>>>> In this one I tried to incorporate WAI CG's advice. > > > > >>>>> http://www.w3.org/2009/06/Text-Alternatives-in-HTML5 > > > > >>>> > > > > >>>> > > > > >>>> I still don't see any rationale given for the following three > alt > > > > >>>> exemptions > > > > >>>> added by your change proposal: > > > > >>>> > > > > >>>> * aria-labelledby attribute present (non-empty only) > > > > >>>> * aria-label attribute is present (non-empty only) > > > > >>>> * role attribute is present and has a value of "presentation". > > > > >>>> > > > > >>>> The "Rationale" section has a factual description of what these > > > > >>>> mechanisms > > > > >>>> are and what they do, but as far as I can tell, no reason is > given > > > for > > > > >>>> why > > > > >>>> it should be allowed to omit alt when one of these is present. > > > Please > > > > >>>> either > > > > >>>> add rationale for these changes or adjust the scope of the > Change > > > > >>>> Proposal > > > > >>>> to exclude them. > > > > >>>> > > > > >>>> > > > > >>>> There are also rationale sections relating to a "CAPTCHA > Loophole" > > > and a > > > > >>>> "WebCam Loophole" which do not appear to relate to any actual > > > changes > > > > >>>> proposed in the Details section. That's not as critical a > problem as > > > > > > > >>>> changes > > > > >>>> without rationale, but it's something you may wish to address. > > > > >>>> > > > > >>>> > > > > >>>> Regards, > > > > >>>> Maciej > > > > >>> > > > > >>> On 6/23/10, Sam Ruby <rubys@intertwingly.net> wrote: > > > > >>>> This change proposal needs to be updated both in order to > provide a > > > > >>>> rationale for each change requested, and to reflect differences > > > from the > > > > >>>> current draft of the document. > > > > >>>> > > > > >>>> As a concrete example, the proposal provides no rationale for > > > removing > > > > >>>> the paragraph-section-heading "loophole" save for a pointer to > a bug > > > > > > > >>>> report, and the resolution of that bug report indicates that > that > > > > >>>> condition was removed. Looking at the current text, this > condition > > > is > > > > >>>> indeed no longer present: > > > > >>>> > > > > >>>> > > > > > > > > http://dev.w3.org/html5/spec/Overview.html#guidance-for-conformance-checkers > > > > >>>> > > > > >>>> Other specific examples: There is rationale given for allowing > > > > >>>> role="presentation", aria-label or aria-labeledby as exemptions > for > > > alt. > > > > >>>> > > > > >>>> - Sam Ruby > > > > >>>> > > > > >>>> On 02/11/2010 03:03 AM, Maciej Stachowiak wrote: > > > > >>>>> (+public-html) > > > > >>>>> > > > > >>>>> Hi Laura, > > > > >>>>> > > > > >>>>> I've recorded this as an additional Change Proposal for > ISSUE-31: > > > > >>>>> http://dev.w3.org/html5/status/issue-status.html#ISSUE-031 > > > > >>>>> > > > > >>>>> (I've suggested previously that you and Ian should work > together to > > > > > > > >>>>> identify any changes here that are uncontroversial, so they can > be > > > > >>>>> directly applied to the HTML5 draft; I hope the two of you find > > > some > > > > >>>>> time to make progress on that.) > > > > >>>>> > > > > >>>>> Regards, > > > > >>>>> Maciej > > > > >>>>> > > > > >>>>> On Jan 28, 2010, at 2:18 AM, Laura Carlson wrote: > > > > >>>>> > > > > >>>>>> Hello Everyone, > > > > >>>>>> > > > > >>>>>> I have drafted a Change Proposal for HTML ISSUE-31. > > > > >>>>>> > > > > >>>>>> Summary: > > > > >>>>>> The current guidance for conformance checkers for Section > 4.8.2.1 > > > the > > > > >>>>>> img element is unclear and does not implement WAI CG's advice > on > > > the > > > > >>>>>> validation of short text alternatives. This change proposal > > > replaces > > > > >>>>>> the current guidance with clear guidance that lists all > required > > > short > > > > >>>>>> text alternative options that exist to be considered valid. It > > > enables > > > > >>>>>> automatic validators to programmatically detect the presence > or > > > > >>>>>> absence of text alternatives. > > > > >>>>>> > > > > >>>>>> Full proposal is at: > > > > >>>>>> > http://esw.w3.org/topic/HTML/ChangeProposals/ImgElement20090126 > > > > >>>>>> > > > > >>>>>> Ideas for improvement are most welcome. > > > > >>>>>> > > > > >>>>>> Thanks. > > > > >>>>>> > > > > >>>>>> Best regards, > > > > >>>>>> Laura > > > > >> > > > > >> -- > > > > >> Laura L. Carlson > > > > >> > > > > > > > > > > > > > > > > > > -- > > > > Laura L. Carlson > > > ------- End of Original Message ------- > > > > > > > -- > > with regards > > > > Steve Faulkner > > Technical Director - TPG Europe > > Director - Web Accessibility Tools Consortium > > > > www.paciellogroup.com | www.wat-c.org > > Web Accessibility Toolbar - > > http://www.paciellogroup.com/resources/wat-ie-about.html > ------- End of Original Message ------- > > -- with regards Steve Faulkner Technical Director - TPG Europe Director - Web Accessibility Tools Consortium www.paciellogroup.com | www.wat-c.org Web Accessibility Toolbar - http://www.paciellogroup.com/resources/wat-ie-about.html
Received on Tuesday, 13 July 2010 21:32:35 UTC