- From: Steven Faulkner <faulkner.steve@gmail.com>
- Date: Mon, 17 Aug 2009 16:39:25 +0100
- To: Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>
- Cc: HTMLWG WG <public-html@w3.org>, W3C WAI-XTECH <wai-xtech@w3.org>
- Message-ID: <55687cf80908170839h5f93da8dy2f65b2f3053a3fba@mail.gmail.com>
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 www.paciellogroup.com | www.wat-c.org Web Accessibility Toolbar - http://www.paciellogroup.com/resources/wat-ie-about.html
Received on Monday, 17 August 2009 15:40:08 UTC