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
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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