[html5] making standards-compliant charts
bhawkeslewis at googlemail.com
Mon Dec 29 17:05:04 PST 2008
On 30/12/08 00:52, Matt Bonner wrote:
> Benjamin Hawkes-Lewis wrote:
>> Matt wrote:
>> calling charts graphical to me seems overly simplified.
>> I don't really see how the presence of characters makes this a simplification.
> Well, to me, saying a chart is "graphical" implies that it is *only* graphical,
> when clearly there are also textual elements in many charts, as your test
"Graph" (etymologically) comes from a word meaning to mark or engrave.
"Graph" is often a synonym for "chart" nowadays, so I don't see why
"graphical" implies the absence of character data.
> Rendering chart text in an image means bigger, slower pages, ugly
With a _bitmap_ image, yes.
> and little hope for assistive technology to extract meaning.
I'm not sure that's true. OCR might actually be the simplest part of the
challenge of extracting meaning from a bitmap chart. (Not that typical
web AT uses OCR!)
Much harder would be working out how the diagrammatic elements relate to
the text, and the meaning of the whole composition.
>> Failing that, create a separate page and add a visible link to it.
> That was my thinking, I just wasn't sure how that would be seen from an
> accessibility standpoint.
Better than nothing!
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