Re: Please vote on the canvas accessibility proposal

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 21:32:49 UTC