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. Right
now,
with your example, it reads the typeset math in an extremely garbled way (but
the mathnotes at leats make sense).
So the question is how to get the content of the mathnotes into the PDF tags…
Matthias
> On Apr 10, 2025, at 2:20 PM, Mikael Sundqvist <mic...@gmail.com> wrote:
>
> 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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>> the Wiki!
>>
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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
> ___________________________________________________________________________________
___________________________________________________________________________________
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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