Thanks Ulrike,

This is helpful (and sad) information.

Would it be possible to  have ConTeXt produce two documents, one that shows the 
typeset formula as usual, and a second one that shows instead of the formula 
the text that Mikael’s example shows as a note? Then screen-reading the second 
output should be acceptable, at least as far as math is concerned?

Thanks,

Matthias

> On Apr 11, 2025, at 6:53 AM, Ulrike Fischer <ne...@nililand.de> wrote:
> 
> Am Thu, 10 Apr 2025 15:02:53 -0400 schrieb Matthias Weber:
> 
>> Thank you Mikael, 
>> 
>> What I would like to to is to have what \placenotes[mathnote]
>> produces added to the pdf as a tag so that a screen reader
>> would be able to read the math.
> 
> The only reader that can currently make use of MathML embedded as
> associated file is Foxit together with a beta version of NVDA and a
> current MathCat.
> See
> https://latex3.github.io/tagging-project/documentation/wtpdf/fulldoc
> for some discussions. 
> 
> To find and use the associated MathML file Foxit requires that it is
> attached to a Formula element in the PDF 2.0 namespace:
> https://github.com/foxitsoftware/PDF_UA-2. 
> 
> context attaches the MathML to a `math` element declared in a
> context specific namespace and then rolemapped (like all other
> structure elements) to the NonStruct structure element (which as the
> name implies has no semantic meaning). This means that this MathML
> is not seen by any reader and useless. If some math is read then
> simply in the amount reader can extract math from untagged PDFs. 
> 
> 
> -- 
> Ulrike Fischer 
> http://www.troubleshooting-tex.de/
> 
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