Hi,
I don't know what you expect, but you can try
%%%
\setupbackend[format=pdf/ua-2]
\setuptagging[state=start]
\registermathsymbol[default][en]["1D467][the variable]
\registermathsymbol[default][en]["1D458][the index]
\enabletrackers[math.textblobs]
\setupnote
[mathnote]
[location=margin]
\starttext
\startformula
\abs {(z__0 + h)^n - z__0^n }
\alignhere
= \abs {\sum_{k = 1}^n \binom{n}{k} h^k z__0^{n - k} }
\breakhere
= \abs {h \sum_{k = 0}^{n - 1} \binom{n}{k + 1} h^k z__0^{n - 1 - k} }
\breakhere
= \abs {h \sum_{k = 0}^{n - 1} \frac {n}{k + 1} \binom{n - 1}{k} h^k
z__0^{n - 1 - k} }
\breakhere
\le n \abs{h} \sum_{k = 0}^{n - 1} \binom{n - 1}{k} \abs{h}^k
\abs{z__0}^{n - 1 - k}
\breakhere
\le n \abs{h} (\abs{z__0} + \abs{h})^{n - 1}
\stopformula
\placenotes[mathnote]
\registermathsymbol[default][en][lowercasebold][the vector]
\startformula
(\alpha + \beta) \mathbf{u} = \alpha \mathbf{u} + \beta \mathbf{u}
\stopformula
\placenotes[mathnote]
\stoptext
%%%
As you see in the text the z and k are now interpreted as variable and
index. The second example gives "the vector" for all lowercasebold.
I will not paste the mathml blob from the bigger formula, but the
smaller one looks like this:
<math>
<mrow>
<mo stretchy="false">(</mo>
<mi>𝛼</mi>
<mo>+</mo>
<mi>𝛽</mi>
<mo stretchy="false">)</mo>
<mi>𝐮</mi>
<mo>=</mo>
<mi>𝛼</mi>
<mi>𝐮</mi>
<mo>+</mo>
<mi>𝛽</mi>
<mi>𝐮</mi>
</mrow>
</math>
/Mikael
On Thu, Apr 10, 2025 at 7:58 PM Matthias Weber
<matthiaswebe...@gmail.com> wrote:
>
> Dear All,
>
>
> Following the instructions in tagging.pdf,
>
> I tried
>
> \setupbackend[format=pdf/ua-2]
> \setuptagging[state=start]
>
> \enabledirectives [backend.usetags=crap]
>
> \registermathsymbol[default][en][ z ][the variable]
> \registermathsymbol[default][en][ k ][the index]
>
>
> \starttext
> \startformula
> \startalign
> \NC \left|(z_0+h)^n - z_0^n\right| \NC = \left|\sum_{k=1}^n \binom{n}{k}h^k
> z_0^{n-k}\right| \NR
> \NC \NC = \left |h \sum_{k=0}^{n-1} \binom{n}{k+1} h^k z_0^{n-1-k}\right| \NR
> \NC \NC = \left|h \sum_{k=0}^{n-1} \frac n {k+1} \binom{n-1}{k} h^k
> z_0^{n-1-k}\right| \NR
> \NC \NC \le n | h| \sum_{k=0}^{n-1} \binom{n-1}{k} |h|^k |z_0|^{n-1-k} \NR
> \NC \NC \le n | h| (|z_0|+|h|)^{n-1} \NR
> \stopalign
> \stopformula
> \stoptext
>
> This creates within the pdf the XML attachment below:
>
>
>
> This XML contains all the information from the formula. Wrapping it into
>
> \usemodule[mathml]
>
> \starttext
> \xmlprocessdata{}{
> % content of XML file
> }{}
> \stoptext
>
> produces
>
>
>
> which is also what my Mac screen reads from the original PDF, but it is
> evidently not what I want.
> Does someone have a working example that shows how to do this right?
>
> Thanks,
>
> Matthias
>
>
> ___________________________________________________________________________________
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>
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> ___________________________________________________________________________________
___________________________________________________________________________________
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
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