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Re: PDF column tag
From: Duff Johnson
Date: Jul 25, 2022 7:20AM
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Bevi makes excellent points, but I want to add a clarificationâ¦
Itâs better to think about âreading orderâ in a PDF in the following two ways:
- The so-called âOrder panelâ reveals the physical ordering of content on the page, but cannot reflect the logical ordering, so no headings, lists, tables, alt. text, etc, etc.
- The tag tree, by contrast, describes the logical ordering; consequently, only AT which processes the tag tree may be considered as supporting accessible PDF.
A rough analogy would be a text viewer, which is certainly capable of âreadingâ HTML, but it isnât a web browser, much less an accessible web browser.