- ntg-context - Mailing Lists

check if symbol or color is defined
by Henning Hraban Ramm 15 Aug '25

15 Aug '25

Hi, how can I check (in Lua or ConTeXt) if a symbol or color is defined? \doifdefined is just for macros, isn’t it? And how can I check if the current font has a glyph? Hraban

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ligatures and inputtranslation
by Michael Guravage 15 Aug '25

15 Aug '25

Hi, I have a document that uses the doves type font in its two variants, one for titles, and one for text. I would like to replace several character combinations with ligatures. The same letter combinations have their own Unicode ligatures in each font variant. With \replaceword I could replace characters with characters, but I could not replace characters with a \utfchar. In this MWE I tried to enable-disableinputtranslation in \setuphead but to no effect. What I would like to do is to define two sets of replacements, i.e. translations, one for each font variant, and apply them to titles and running text respectively. Any suggestions? -- Michael PS: I attached a PDF showing the ligatures I'm using. \usemodule[translate] \switchtobodyfont[pagella] \translateinput[AE][\AE] % For titles \translateinput[ae][\ae] % For text \setuphead[title][before=\enableinputtranslation, after=\disableinputtranslation] \starttext \title{Aeneid} \enableinputtranslation aeneid \disableinputtranslation \stoptext <http://literatesolutions.com>

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Error with vskip and interaction in 20250813
by Rik Kabel 15 Aug '25

15 Aug '25

With the latest (2025-08-13) I get an error from the following: \setupinteraction [state=stop] \definelabel[Qi] [text={\hbox to \dimexpr +15pt\relax{}}, alternative=inright, way=bytext, headstyle=small, before=,after=, ] \starttexdefinition tolerant protected unexpanded startBlockQuotation \begingroup \Qi \vskip -2\lineheight\relax % \blank[-2*line] \stoptexdefinition \starttexdefinition stopBlockQuotation \endgroup \stoptexdefinition \starttexdefinition tolerant protected unexpanded startExtract \begingroup \grabbufferdata[Extract] [startExtract] [stopExtract] \stoptexdefinition \starttexdefinition stopExtract \blank[back,line] \inlinebuffer[Extract] \endgroup \blank[line] \stoptexdefinition \starttext \startBlockQuotation \startExtract \samplefile klein \par \stopExtract \stopBlockQuotation \samplefile klein\startendnote[] \samplefile klein\par \startBlockQuotation \startExtract \samplefile klein \par \stopExtract \stopBlockQuotation \stopendnote \samplefile klein \par \placenotes[endnote] \stoptext The error can be eliminated by changing interaction to stop, but I want interaction. The vskip is needed here because blank does not do the job, as you can test in the example. Is this a side effect of the new tagging changes? (A workaround that uses blank would be welcome.) -- Rik

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Notes at end of book
by Thomas A. Schmitz 15 Aug '25

15 Aug '25

Hi all, I'd like some advise on the best way to approach the result I want. I'm typesetting a book; the source is in xml, every chapter in its own file. I want my notes to appear in their own chapter at the end of the book; the reference (in the margin) should be to the page number where the paragraph with the note reference is found. For my work with the source files, I would prefer the notes be included within the respective xml files. The solution I have been thinking about: every note has a unique xml:id attribute, ConTeXt sets a \pagereference with the value of this attribute and writes the content of all notes to an external file. Then, I can retrieve the notes from this file and include the page number from the \pagereference. I'm making some progress here, but am not quite sure how to use \xmltofile or \xmlsave (or their Lua counterparts lxml.tofile or xml.save). I'm also wondering if I'm reinventing the wheel here. Maybe there is an easier solution because notes can be postponed? I'll be grateful for any ideas! All best Thomas

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mtxrun --script epub and modes
by Florent Michel 15 Aug '25

15 Aug '25

Hi, TL;DR: Is there a way to pass a `mode` argument when running `mtxrun --script epub --images`? Thanks a lot Hans and Mikael for yesterday's update! Your efforts to make ConTeXt-generated documents more accessible are really appreciated! (And may make my question moot :D Although I imagine there will still be use-cases for html/epub export.) I have a document where different versions should have a different number of images. Following an earlier suggestion from Wolfgang, I usually handle differences between versions of the same document using modes, which works very well for pdf outputs. However, I could not figure out how to generate the correct images for html export. For example, if I have the following: test.tex ________________ \setupbackend[export=yes] \starttext A well-known equation: \startmode[show_formula] \startformula e = \frac{m c^2}{\sqrt{1 - v^2 / c^2}} \stopformula \stopmode \stoptext ___________________ and run mtxrun --script epub --images test.tex context test.tex --mode=show-formula the pdf output is correct but the html output lacks the formula. (The output is correct if I delete `\startmode[show_formula]` and `\stopmode`.) Is there a way to activate the `show_formula` mode when running `mtxrun --script epub --images`? Cheers, Florent

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\chemical together with \frac
by Thomas Meyer 14 Aug '25

14 Aug '25

Hi folks, I try to write \chemical{Na + H_2O → NaOH + 1/2 H_2} and it works. But I do not like 1/2 that way. But if I want to use \chemical{Na + H_2O → NaOH + \frac{1}{2} H_2} %\frac or variants of it it doesn't work. \chemical{Na + H_2O → NaOh +}\frac{1}{2}\chemical{H_2} doesn't work too. \startformula \chemical{Na + H_2O → NaOH +}\xxfrac{1}{2}\chemical{H_2} % and some other variants of \frac \stopformula does work, but the distance between + and the \frac-expression is to large. Any hints? Greetings Tomás

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How to use Metapost libraries with Metafun?
by Shiv Shankar Dayal 14 Aug '25

14 Aug '25

Hi, How can I use Metapost libraries from texlive in ConTeXt? -- Respect, Shiv Shankar Dayal

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tagigng
by Hans Hagen 13 Aug '25

13 Aug '25

Hi, Due to some pressure on this list we have been looking into reasonable mapping from context structure onto what pdf sees as structure as of 2025. This is not without risk as the pdf standard, tools, interpretations, whatever are in constant flux. We don't fall into the target audience so our decisions are guess work at best. That said, we now do the following. If you enable tagging \setuptagging[state=start] you get normal tagging, without so called rolemapping. This can work out ok with (future) more clever parsers of the content stream (think llm). It doesn't pollute the pdf too much but of course bloats it. Then, if you want to go fuzzy, you can say \setupbackend [format=pdf/ua-2] \setuptagging [state=start] This gives some basic mapping. Then there is a basic mapping that or with Mikael figured out and tested on lecture notes and a math book. Of course runtime increases (so the book now needs 14 sec instead of 8 but so be it we might be able to improve that a little bit but all that math ... it's not like one tags all day). \setuptagging [state=start, preset=basic, % preset={basic,\jobname}, comment={just a basic test document}] You can kick in your own mappings, e.g. which could already be done with commands but we now prefer using an "imp" file as hard pdf mapping doesn't belong in a document setup. You, as user / author knows best what mapping is nneeded and can work. There is tagging-basic.tex document that explains this. We advise to delay tagging (if needed at all, which in my case is never) to when a document is finished (maybe by wrapping in a mode tagging) so that no runtime is wasted during writing / designing. You can test / check some with mtxrun --script pdf --structure [--detail --save] yourdocument mtxrun --script pdf --validate [--interaction] yourdocument where the second one calls for verapdf, or simply test with mtxrun --script pdf --check yourdocument this is only for testing purposes; we might add some to it depending on our own or user demand. The possibly generated file serves no other purpose (and obeys crap-in-crap-out). Of course, different versions of verapdf can result in different results By default we ignore interaction because that is a mess in tagged pdf but you can use option=interaction to get something if needed. We think that when a document validates with exception of link/references no one is harmed. After the context meeting we will freeze the basic mapping but one can of course always modulate on it, Hans & Mikael (who will now pick up on more rewarding and fun things that we'd put in the hold) ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------

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Cron <context@cgl> /var/www/aanhet.net/context/bin/cron/context-mirror
by root＠ntg.nl 13 Aug '25

13 Aug '25

receiving incremental file list ./ ctan.lsr document-2.htm download-1.htm download-2.htm logo-ade.png logo-cts.png logo-pod.png rss.xml show-fil.pdf context/latest/ context/latest/cont-lmt.zip context/latest/cont-mpd.zip context/latest/cont-ppc.zip context/latest/cont-sci.zip context/latest/cont-tmf.zip context/latest/cont-tst.7z context/latest/cont-tst.tar.xz context/latest/cont-tst.zip general/manuals/ general/manuals/signals.pdf general/manuals/tagging.pdf sent 187,987 bytes received 44,017,821 bytes 4,653,242.95 bytes/sec total size is 629,889,557 speedup is 14.25 Running archiver: New dir: /var/www/aanhet.net/context//htdocs/archives/context-2025-08-13.18 279700019 /var/www/aanhet.net/context//htdocs/archives/context-2025-08-13.18/latest 126741221 /var/www/aanhet.net/context//htdocs/archives/context-2025-08-13.18/current 406441240 /var/www/aanhet.net/context//htdocs/archives/context-2025-08-13.18 406441240 total

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regular online meet-up
by Hraban Ramm 13 Aug '25

13 Aug '25

You’re invited to our regular online meet-up, this upcoming Wednesday, August 13th, 20:00 CEST (UTC+2) at https://lecture.senfcall.de/hen-rbr-rku-oke (same, but shorter: https://u.mtxrun.eu/ctxmtg) ConTeXt users of all levels are welcome! Looking forward to seeing you, Hraban (Same blurb as always:) [Howto] * No special software installation required; most modern browsers should work (WebRTC required). * Open the URL above, accept the privacy statement, * enter your name, * click "join" (or "start" if you’re the first), * click "with microphone", allow your browser to access it, check the audio. * Your microphone is muted if you join. Activate microphone and/or camera with the buttons at the bottom. * Minimize the default presentation with the "screen" button, bottom right. * If you’d like to share your screen or upload a file, you can make yourself the presenter: Click on your user name, change the setting, then you’ll see the "screen sharing" button beside the camera button; also there’s now "manage presentations" behind the "plus" button. Beware there is only one presenter at a time, so don’t kill someone else’s presentation. [Technical hints] * Sound is usually better if you use a headset (less noise for everyone). * Connection problems are mostly due to low bandwidth or high latency on your side, esp. with mobile connections. * Sometimes leaving and re-entering helps. * If audio/video doesn’t work for you, you can still use the text chat. * Screen sharing needs a lot of bandwidth. * BigBlueButton documentation applies: https://bigbluebutton.org/tutorials/ [Netiquette] * Please use a name that we recognize from here. Some feel uncomfortable with anonymous lurkers. * Mute your microphone while you’re not talking. * It’s nice to show your face at least when you join. * If there are connection problems, stop camera sharing. * The room is set to “everyone’s a moderator“, I trust you...

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