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Re: Need differentiator between "no alt text provided" and "no alt text necessary"

From: Ian Hickson <ian@hixie.ch>
Date: Sat, 7 Feb 2009 00:10:33 +0000 (UTC)
To: James Craig <jcraig@apple.com>
Cc: public-html@w3.org
Message-ID: <Pine.LNX.4.62.0902070008500.952@hixie.dreamhostps.com>

On Fri, 6 Feb 2009, James Craig wrote:
> > > 
> > > 6. If no caption information can be determined from the previous 
> > > steps, user agents MAY assume the image is a key part of the content 
> > > lacking a textual equivalent in the document
> >
> > What does this require? Could you describe a test page that 
> > demonstrates how to test whether a user agent is complying to this 
> > requirement or not?
> > 
> > There's no point adding requirements that aren't testable.
> 
> Do you need to test an RFC 2119 "MAY"?

It has to be testable, otherwise it's meaningless as a requirement. MAY 
requirements (and actually even SHOULD requirements) aren't likely to be 
tested in a conformance test suite, though, no.


> If so, it's fine without this item now that the other clarification was 
> added. Thanks again.

My pleasure.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Saturday, 7 February 2009 00:11:09 UTC

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