Re: feedback requested on WAI CG Consensus Resolutions on Text alternatives in HTML 5 document

hi benjamin,

understand where your coming from,

the AT could just as well support a mode where all images are available
including those with role="presentation"
this could be achieved by accessing the HTML DOM rather than the
accessibility API's, AT's already do this for h1-h6 and other elements that
do not have useful mappings to properties in accessibility API's


regards
steve

2009/8/17 Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>

> On 17/08/2009 11:38, Steven Faulkner wrote:
>
>> hi benjamin,
>> <p>As you can see from the chart below, sales increased in 2008:</p>
>> <img alt="" src="chart.png">
>>
>> from my understaning this does not conform to WCAG 2.0.
>>
>
> That matches my understanding.
>
> But the example wasn't supposed to conform to WCAG 2.0 or even my idea of
> best practice: it was supposed to be an example of the "variety of authoring
> practice around 'alt'" that makes simply assuming an "img" with alt="" will
> never need exposure to AT unsafe.
>
> I think it's generally best for AT to ignore such "img" elements by default
> (when they aren't needed to help generate labels). But I do think a mode
> where even these "img" elements are exposed has user value, given the
> alternative is to make users dig through a DOM Inspector or source code.
>
> Example use-case: Joe is a blind advanced screen reader user putting
> together a presentation about his company's performance over the past year.
> He goes to the corporate wiki and finds references to charts for sales in
> 2008 and profit/loss margins in 2008, but can't find them when reading
> through the page. He switches to a mode that exposes even images with alt=""
> and retrieves the charts based on the document sequence.
>
> Like I said originally, this use case is "tendentious". People can take
> different views about whether it's practical to support.
>
> --
> Benjamin Hawkes-Lewis
>



-- 
with regards

Steve Faulkner
Technical Director - TPG Europe
Director - Web Accessibility Tools Consortium

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