W3C home > Mailing lists > Public > public-comments-wcag20@w3.org > December 2008

Re: Technique H45 procedure description incomplete

From: Loretta Guarino Reid <lorettaguarino@google.com>
Date: Mon, 1 Dec 2008 15:16:42 -0800
Message-ID: <824e742c0812011516w7bb6f322q7990818d69947c75@mail.gmail.com>
To: Dylan Nicholson <d.nicholson@hisoftware.com>
Cc: "public-comments-wcag20@w3.org" <public-comments-wcag20@w3.org>
Any image *that uses this technique* must pass the check. However, different
images, even on the same page, may use different techniques to meet the
success criterion.

On Mon, Dec 1, 2008 at 3:13 PM, Dylan Nicholson
<d.nicholson@hisoftware.com>wrote:

>  No, this is still problematic because it implies every IMG *should* have
> a LONGDESC attribute.
>
> In reality, only a tiny percentage of real world IMG elements have LONGDESC
> attributes.
>
> Having to check that the resource exists does make an automatic check
> somewhat less efficient, but given that LONGDESC is so rare, it shouldn't be
> an issue.
>
> At this point I doubt we would bother with implementing an automatic check
> on the actual content of the page linked to.
>
>  ------------------------------
> *From:* Loretta Guarino Reid [lorettaguarino@google.com]
> *Sent:* Tuesday, 2 December 2008 9:55 AM
> *To:* Dylan Nicholson
> *Cc:* public-comments-wcag20@w3.org
> *Subject:* Re: Technique H45 procedure description incomplete
>
>  On Wed, Nov 12, 2008 at 9:20 PM, Dylan Nicholson <
> d.nicholson@hisoftware.com> wrote:
>
>>  H45 is described as
>>
>>  Procedure
>>
>>    1.
>>
>>    Check that a longdesc attribute exists.
>>    2.
>>
>>    Check that the link in the longdesc attribute is valid
>>    3.
>>
>>    Check that the long description describes the original non-text
>>    content associated with it.
>>
>>  Expected Results
>>
>>    -
>>
>>    #1 through #3 are all true
>>
>> But a) it doesn't explain on what elements we are to check for the
>> longdesc attribute - presumably it should be IMG elements only in this case,
>> and not FRAMES and IFRAMEs
>>
>> b) surely it's not implying that to pass H45 every element that supports
>> longdesc attributes must in fact do so??  That would cause virtually every
>> page on the web to fail immediately, as I don't think I've ever seen a
>> commercial site using LONGDESC - at least, not correctly.
>>
>> c) what is meant by valid?  That it's a valid url?  Or it actually points
>> to a resource that really exists?  If the former, fine (and a very good
>> idea, seeing I've seen quite a few cases where the LONGDESC attribute
>> actually contains the descriptive text in the value, rather than a URL
>> pointing to where to find the text), but if the latter, then testing this
>> automatically becomes potentially expensive on a large site (well, it would,
>> if anyone actually used LONGDESC).
>>
> ================================
> Response from the Working Group
> ================================
>
> Thank you, we have updated the test procedure to clarify these issues. See
> http://www.w3.org/WAI/GL/WCAG20/WD-WCAG20-TECHS/H45.html .
>
> Could you let us know by Monday, December 8 whether you are satisfied with
> our resolution? If that date is not possible, please reply to this message
> indicating when you will be able to respond.
>
> If we do not hear from you by Monday, December 8, we will assume that you
> are satisfied with the responses to your comments.
>
> Thanks again for the interest that you have taken in these guidelines.
>
> Loretta Guarino Reid, WCAG WG Co-Chair
> Gregg Vanderheiden, WCAG WG Co-Chair
> Michael Cooper, WCAG WG Staff Contact
>
>
>
Received on Monday, 1 December 2008 23:17:20 UTC

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