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Re: WCAG Techniques - errors? (was RE: PDF's and Signatures)

From: Duff Johnson <duff@duff-johnson.com>
Date: Thu, 22 Jan 2015 10:43:12 -0500
Message-Id: <EA8B4C88-3402-4937-BC42-74B503D40148@duff-johnson.com>
To: "w3c-wai-ig@w3.org Group" <w3c-wai-ig@w3.org>
Hi John,

> I am somewhat concerned by this statement. Can you elaborate on which 
> techniques you believe are "simply wrong, or misleading”?

Just start with PDF3, Example 4, which advises use of Acrobat’s “Reflow” feature to “check the reading order”.

The problem is that the Reflow feature does not use tagged PDF to show the logical (i.e., tagged) reading order of the content. Reflow uses the content order (the sequence of objects as they are written to the page), which often differs from the logical reading order.

Of course, it is the logical reading order that is of interest to AT users.

I regard PDF3 as one of the leading causes of end-user confusion when it comes to understanding how to make PDF files accessible.

> The WCAG Techniques 
> group should be advised of these issues, so that they can be addressed 
> (although I find it curious, as Andrew Kirkpatrick is the chair of that 
> working group at the W3C). For the benefit of us all, please do elaborate. 
> (Thanks!!)

Some of these issues (PDF3 being the most egregious in several aspects) have been raised in the past.

Received on Thursday, 22 January 2015 15:43:44 UTC

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