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RE: Discussion on SC numbering

From: Katie Haritos-Shea GMAIL <ryladog@gmail.com>
Date: Wed, 21 Dec 2016 11:34:31 -0500
To: "'Alastair Campbell'" <acampbell@nomensa.com>
Cc: "'WCAG'" <w3c-wai-gl@w3.org>
Message-ID: <3f6301d25ba8$1bb49ae0$531dd0a0$@gmail.com>


I get your point. Hmmmm…


The problem is I *thought* we were not going to change the existing SC, and that this was clearly indicated to the TFs when proposing new SC….:-(


Boy this is one reason it would have been nice to have *clearly defined* as a requirement (and again, I thought it was). Add to the lessons-learned department….

To be backwards compatible it looks as if the new content they suggest for an existing SC will have to became a new SC related just to the specific changes.


This would sort of go along with the idea that each new SC should have - and then test – very distinct criteria.




​​​​​* katie *


Katie Haritos-Shea 
Principal ICT Accessibility Architect (WCAG/Section 508/ADA/AODA)


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From: Alastair Campbell [mailto:acampbell@nomensa.com] 
Sent: Wednesday, December 21, 2016 10:59 AM
To: Katie Haritos-Shea GMAIL <ryladog@gmail.com>
Cc: 'WCAG' <w3c-wai-gl@w3.org>
Subject: Re: Discussion on SC numbering


> We should not touch current SC. If there is slight overlap with SC, so be it….:-)


Hi Katie,


That isn’t the situation for many new SCs, the impact of that approach is that either:

-          None of the ‘increased’ requirements can make it through to 2.1 (including many from COGA), or

-          We will have duplicate (raised level) or severely overlapping SCs.


For example (from a quick skim, there are probably more):












All of those will either overlap *a lot*, or they can’t go into 2.1.


NB: I had raised this previously [1], but it wasn’t really the time to discuss it as the SCs weren’t close enough. Now they are.


What I’m saying is that if a new SC is “Good” (meets the SC requirements apart from overlap), then we tackle each case, analyse the understanding, techniques & failures docs, and if it can be done in a backwards compatible way, update the existing SC.






1] https://lists.w3.org/Archives/Public/w3c-wai-gl/2016OctDec/0018.html 
Received on Wednesday, 21 December 2016 16:35:07 UTC

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