RE: Numbering Scheme for WCAG 2.1

From: John Foliot [mailto:john.foliot@deque.com]
Sent: Monday, July 18, 2016 6:49 PM
To: WCAG <w3c-wai-gl@w3.org>

One item that did not receive a lot of discussion, but has surfaced on some of the Task Force lists, is what to do with existing Success Criteria that will need to be modified in some fashion in WCAG 2.1. There are concerns over WCAG 2.1 being seen as “too big”, as well as a concern over ‘repeating’ requirements based upon conditional statements (see the thread at the Mobile TF list).
[Jason] I suggest modifying the existing criterion and adding a letter (prefix or suffix) to distinguish it from the original would be unambiguous without adding unnecessary SCs.

Based upon all of this, and pending further discussion on Tuesday’s WCAG call, I would like to propose the following model as the one that appeared to draw the most support (Model #2), with modification s based upon the “legislation” model feedback.
   (Please note that the use of  (*new) in this email is only to address the visual formatting used in this email in some instances, but would not be part of the numbering scheme)

3.1 Readable
  3.1.1 Language of Page A
  3.1.2 Language of Parts AA
  3.1.3 Unusual Words AAA
  3.1.4 Abbreviations AAA
  3.1.5 Reading Level AAA
  3.1.6 Pronunciation AAA
  3.1.7 New COGA AA (*new)
  3.1.8 New Mobile A (*new)
  3.1.9 New COGA AA (*new)

[Jason] Is 3.1.7 really meant to be AA, or is it level A instead?
Also, there’s an implication here that the criteria are tied to the Task Forces, whereas in fact I suspect many of them will simultaneously address needs arising from multiple sources, including Task Forces.
Plus…
   1.2.2 Captions (Prerecorded): Captions are provided for all prerecorded audio ... (Level A)
   1.2.3 Audio Description or Media Alternative (Prerecorded): ... (Level A)
        1.2.3A Some new SC that is related to this concept, but distinct (Level AA) (*new)
        1.2.3B Another new SC that is related but distinct (Level AA) (*new)
   1.2.4 Captions (Live): Captions are provided for all live audio content ... (Level AA)

…with the suggestion that this type of numbering scheme would be extremely useful for the Mobile work, where many of the existing Success Criteria are close, but not quite enough for mobile requirements.

[Jason] Why not just modify the existing SC, then change the number as suggested above?


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