Dear All,
I am starting a new thread as requested.
I can confirm that
>
> the following should work with current latest (from yesterday,
> LuaMetaTeX 2.11.07 20250427 + ConTeXt LMTX 2025.04.28 14:29):
>
> \enabledirectives [backend.usetags=testing]
> \setuptagging[state=start]
> \setupstructure[state=start]
> \setupbackend
> [format=PDF/A-3a]
> \setupbackend[format=pdf/ua-1]
> \setupexternalfigures[location=default]
> \starttext
> \externalfigure[hacker][label={this is an image}]
>
> \startparagraph
> a
> \stopparagraph
> \stoptext
produces a PDF that passes the accessibility check in the current Adobe
Acrobat. In particular, it passes the alternate text checks.
Hovering over the image shows the alternate text in Acrobat.
However, VoiceOver (on the Mac) does not read the alternate text; it completely
ignores the existence of the image.
In Preview, no alternate text is shown or read. So it seems that the only
benefit is that readers with vision can see an alternate text...
I don’t have access to a Windows machine, so I cannot test what other screen
readers can do with this document.
Thanks,
Matthias
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl /
https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
webpage : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
archive : https://github.com/contextgarden/context
wiki : https://wiki.contextgarden.net
___________________________________________________________________________________
