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Which lua XML library is embedded in LMTX?
by Gerben Wierda 26 Jun '20

26 Jun '20

According to the XML manual: << 2.1 >> TEX versus LUA It will not come as a surprise that we can access xml files from TEX as well as from Lua. In fact there are two methods to deal with xml in Lua. First there are the low level xml functions in the xml namespace. On top of those functions there is a set of functions in the lxml namespace that deals with xml in a more TEXie way. << 3.7 >> manipulation You can use Lua code to manipulate the tree and it makes no sense to duplicate this in TEX. In the future we might provide an interface to some of this functionality. Keep in mind that manipuating the tree might have side effects as we maintain several indices into the tree that also needs to be updated then. Having read that, I was loooking for the documentation of the commands that are available in the xml namespace. I want to manipulate a XML tree in LMTX lua. But looking online gives me all kinds of different XML-solutions that are proposed for lua. Which one is embedded in LMTX and available in the xml namespace? But then I get confused because other elements like xml.first, xml.collected are in the xml namespavce and mentioned. So, maybe I misunderstand things and is the documentation in << 5.5 >> selectors and injectors This section describes a bit special feature, one that we needed for a project where we could not touch the original content but could add specific sections for our own purpose. Hopefully the example demonstrates its useability. But that part I do not understand. What I need (in LMTX lua) to add (sub)nodes to the XML node (that I read with xml.first()) because the data I get is broken and I need to fix it before I can use it (and I cannot get good data) The easiest way is to add the correct data to the XML and then use it in my code. If I cannot do that I need to write parallel code that largely does the same as what I already have (ugh).. G

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Macros which scan subscripts/superscripts in ConTeXt
by Jairo A. del Rio 26 Jun '20

26 Jun '20

Hi, list! I've seen the following in Stack Exchange: https://tex.stackexchange.com/questions/503208/define-macro-that-scans-ahea… The answer is: \documentclass{article}\usepackage{amsmath}\usepackage{xparse} \NewDocumentCommand{\mymathsym}{e{^_}}{% x^{\mathrm{foo}\IfValueT{#1}{,#1}}_{\mathrm{bar}\IfValueT{#2}{,#2}}%} \begin{document} \begin{gather}\mymathsym \\\mymathsym^{\mathrm{extrasup}} \\\mymathsym_{\mathrm{extrasub}} \\\mymathsym^{\mathrm{extrasup}}_{\mathrm{extrasub}} \\\mymathsym_{\mathrm{extrasub}}^{\mathrm{extrasup}} \end{gather} \end{document} Such a macro contextually defines a behavior for a subscript and a superscript even if they aren't displayed in a specific order, so \mymacro_{a}^{b} \mymacro^{b}_{a} have the same output, even if the intended behavior is not the typical one (I could redefine it so subscripts change colors, for instance). Although I could just port the macro using xparse-generic because it works in ConTeXt too, how to define a macro like that the ConTeXt way, i.e., using only ConTeXt macros? Thank you in advance. Jairo :)

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French interface - previous message = wrong title
by Garulfo 25 Jun '20

25 Jun '20

Hi, I try to update and to fill the french content of mult-def.lua. Currently, I have an updated "mult-def.lua" file. 3 questions : 1/ which commands should be executed in order to make the new local interface effective with context 2/ which commands should be executed in order to build a local version of setup-fr.pdf 3/ many commands in setup-fr.pdf are not documented in mult-def.lua where does the additionnal translations should come from ? Thanks a lot for your precious help.

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update
by Hans Hagen 25 Jun '20

25 Jun '20

Hi, I uploaded a new version (both mkiv and lmtx). We removed some low level no longer used code (older engines), normalized some in the process, fixed a few things, etc. === lmtx only === While updating the cld manual I decided to also add an other table mechanism (in addition to the one already reported in an earlier mail). I have no clue how useful it is, but as usual with tex, users find ways to (ab)use it. This one behaves a bit more like registers. A hashed one is defined as: \newhashedtable\somehashtable \somehashtable{ foo = 123, bar = "foo" } [123 = \the\somehashtable{foo}] [123 = \the\somehashtable foo ] [foo = \the\somehashtable{bar}] [foo = \the\somehashtable bar ] \bgroup \somehashtable{ foo = 456, bar = "oof" } [456 = \the\somehashtable{foo}] [oof = \the\somehashtable{bar}] \egroup [123 = \the\somehashtable{foo}] [foo = \the\somehashtable{bar}] \bgroup \global\somehashtable{ foo = 456 } \somehashtable{ bar = "oof" } [456 = \the\somehashtable{foo}] [oof = \the\somehashtable{bar}] \egroup [456 = \the\somehashtable{foo}] [foo = \the\somehashtable{bar}] or an indexed one: \newindexedtable\someindextable \someindextable{ 123, "foo" } [123 = \the\someindextable 1] [123 = \the\someindextable \numexpr 2 - 1\relax] [foo = \the\someindextable 2] [foo = \the\someindextable \numexpr 1 + 1\relax] \bgroup \someindextable{ 456, "oof" } [456 = \the\someindextable 1] [oof = \the\someindextable 2] \egroup [123 = \the\someindextable 1] [foo = \the\someindextable 2] \bgroup \global\someindextable{ [1] = 456 } \someindextable{ [2] = "oof" } [456 = \the\someindextable 1] [oof = \the\someindextable 2] \egroup [456 = \the\someindextable 1] [foo = \the\someindextable 2] In both cases, local and global assignments are supported. At the Lua end you can access these tables too: context.hashedtables.somehashtable.bar context.indexedtables.someindextable[2] There is some overhead involved but performance and memory usage is quiite okay. Hans ----------------------------------------------------------------- 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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.jpeg not recognised in LMTX
by Sytse Knypstra 25 Jun '20

25 Jun '20

Today I discovered that my LMTX version (2020.06.20) does not render an \externalfigure with .jpeg extension. After renaming to .jpg the picture is correctly shown. I would suggest to add the .jpeg extension to the list of allowed graphic types in LMTX. With greetings, Sytse Knypstra

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latest silly question - insert unicode character?
by Mike Cooper 25 Jun '20

25 Jun '20

Hi. Me again. How does one insert/use a special character? At this particular time, I want Double Prime: Unicode 02BA. How?? THANKS! Mike Cooper Technical Trainer Murchison Drilling Schools, Inc. 2501 Juan Tabo NE Albuquerque, NM 87112 Tel: (505) 293-6271 Fax: (505) 298-5294 Email: mike(a)murchisondrillingschools.com<mailto:mike@murchisondrillingschools.com> Website: www.murchisondrillingschools.com<http://www.murchisondrillingschools.com/> [cid:image007.jpg@01D03ADC.BD6E6850]<https://www.facebook.com/pages/Murchison-Drilling-Schools/158018484232622> [cid:image008.jpg@01D03ADC.BD6E6850] <http://www.linkedin.com/company/murchison-drilling-schools-inc-> [cid:image009.jpg@01D03ADC.BD6E6850] <https://twitter.com/trainingmds> Murchison Drilling Schools is now part of [cid:image001.png@01D63515.857FD120]

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Checking for singlesided/doublesided at run-time
by Lukas/ConTeXt 24 Jun '20

24 Jun '20

Hello, is there a way to detect whether the document is intended as single- or double- sided, IOW, whether \setuppagenumbering[alternative=singlesided] or \setuppagenumbering[alternative=doublesided] has been specified? If so, is it possible by Lua, too? Regards, Lukas

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explain please
by Hans van der Meer 24 Jun '20

24 Jun '20

How can the crash in the minimal example here be explained? And is there a solution to avoid this and make the crash going away "without having to jump through special hoops"? dr. Hans van der Meer

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Automatic userdata storage between runs
by Lukas/ConTeXt 24 Jun '20

24 Jun '20

Hello, first - thanks for the perfectly synoptical https://wiki.contextgarden.net/Programming_in_LuaTeX#Namespaces ! My question (and the answer sould appear on wiki, too): Is any of the namespaces (userdata, thirddata, moduledata, documentdata, parametersets) automatically serialized between Ctx first(-second(-third)) runs? I'm asking because user may call some (longer) code and put the result into a namespace (be it e.g. "userdata"). And if that namespace was automatically serialized for next run(s), that code could be called conditionally - typically just in first run (= mode "*first" enabled) - as in next runs results of the additional code would be available in a namespace (instead of repetitive call of that (longer) code). Of course, user can perform such evaluation, storage and conditional extra-code-call individually, but maybe there is some support for similar situations in Ctx. Best regards, Lukas

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CMYK workflow. How to set and should I worry about
by Keith McKay 23 Jun '20

23 Jun '20

Colleagues I'm getting ready to send a book to the printers and in their blurb they state "/Ensure that you are using a CMYK workflow and export to PDF/X-1a:2001" . /I can set the pdf format using \setupbackend but I'm unsure as to what to do about CMYK workflow. The book has no colour pages so I'm not sure if I really need to worry about CMYK workflow. Could someone advise? Thanks and Best Wishes Keith McKay //

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