[NTG-context] Re: Tagging Math

15 Apr 2025

      Thanks Pablo,

I don’t understand how to do this.

The following compiles,  but I don’t think the label made it into the pdf.

 \enabledirectives [backend.usetags=crap]
   \setuptagging[state=start]
   \setupstructure[state=start]
   \setupbackend
     [format=PDF/A-3a,
      intent=sRGB IEC61966-2.1,
      level=0]
   \setupbackend[format=pdf/ua-1]

 \starttext
\startformula[label=e to the power of parenthesis pi times i end parenthesis plus 1 equals 0]
e^{\pi i}+1 =0
\stopformula
\stoptext

I would prefer not to have to type out the text of hundreds of formulas because ConTeXt does already a pretty good job of converting formulas into (machine) readable text.
What I would like to work is something like

\enabletrackers[math.textblobs]

\setupnote
 [mathnote]
 [location=tag]

 \starttext
\startformula
e^{\pi i}+1 =0
\stopformula
\stoptext

so that the output of the tracker is used as a tag for the formula.

Thanks,

Matthias
...
On Apr 15, 2025, at 11:39 AM, Pablo Rodriguez via ntg-context  wrote:
On 4/11/25 18:44, Matthias Weber wrote:
...
[...]
The best way(while waiting) seems to be to provide two documents, where
the accessible version replaces all images with text that I write, and
all formulas with the text that Mikael’s example produces. So my question
is just this: how do I make that automatic: have all formulas replaced
by a text that reads like a spoken formula?
Sorry for the late comment, but I think an easier solution is adding
label to provide alternative texts in formulas.
This is required in PDF/UA-1 and afaIk not forbidden in PDF/UA-2.
So, there would be no need to generate an accesible and non-accesible
version of each document.
Pablo
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