Understanding SC 2.5.8: Target Size (Minimum) (Level AA) potential edit from David Berman

Hi committee,

Thank you again for all the amazing work!

Regarding the following existing wording within Understanding SC 2.5.8:
Target Size (Minimum) (Level AA):

“Except when... Inline: The target is in a sentence or its size is
otherwise constrained by the line-height of non-target text;”

If one follows the guidance you provide here, there are situations where
people are going to do the opposite of what I’m confident you would have
hoped they would do. Let me explain by example...

Consider a Table of Contents within a 100-page EPUB or PDF file of a
textbook where each entry in the Table of Contents has the entire entry
hypertext linked (to take you, for instance, to the first page of a
chapter). One would hope that the “Inline” exception would apply; however,
the target is not “in a sentence” nor is it “constrained by the line-height
of non-target text” (because all of the text surrounding it also has
targets). Thus, it would seem that in order to fulfil your instructions and
not be able to use the “Inline” exception, that one would have to increase
the line spacing between consecutive baselines of the wording in the entire
TOC to at least 24 pixels (even more if there are descending letters, such
as y or p, which there are bound to be). This would result in a typical TOC
in a textbook that spanned perhaps 3 book pages now spanning 6 or more book
pages. And if there are dot leaders, the gap is even more extreme. If you
agree that this is an undesirable outcome, then the vocabulary of the
exception should be broadened to allow for the arrangement of text that I
am describing to also fall within the exception.

Would you agree, or should we indeed insist that such TOCs have at least 24
pixels between TOC elements?

And if you do agree, would you like help with the proposed wording (as I
have ideas on how we get there without tradeoffs)?

- David Berman CPWA, ADS



-- 
David Berman, RGD, FGDC, CPWA
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