- From: Ian Hickson <ian@hixie.ch>
- Date: Wed, 24 Feb 2010 21:32:21 +0000 (UTC)
- To: Richard Schwerdtfeger <schwer@us.ibm.com>
- Cc: public-canvas-api@w3.org, "public-html-a11y@w3.org" <public-html-a11y@w3.org>
On Wed, 24 Feb 2010, Richard Schwerdtfeger wrote:
>
> > # "When authors use the canvas element, they must also provide content
> > # that, when presented to the user, conveys essentially the same
> > # function or purpose as the bitmap canvas."
>
> That is not an RFC MUST.
It is a normative conformance requirement with the full weight of RFC 2119
behind it, if that's what you mean.
> It also does not mean it is accessible if you are saying the canvas can
> only act as a bitmap.
I don't see how something that "conveys essentially the same function or
purpose", when presented to the user, can be anything _but_ accessible.
This is the same kind of requirement as we have for <img alt=""> ("the alt
attribute [...] must convey the same message as the image specified in the
src attribute", and so forth -- there's a whole huge section giving all
the requirements for <img alt> being accessible).
--
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
Received on Wednesday, 24 February 2010 21:32:51 UTC