The L3 programming layer interface for latex was introduced to provide better syntax and library for LaTeX programmers. With little material about the language, where can I find its technical manual?
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texdoc interface3ortexdoc expl3for a higher level overview. Also look at https://www.alanshawn.com/latex3-tutorial/ No idea why you say "little material" ? – David Carlisle Oct 02 '22 at 14:15hyphen (-)in addition tounderscore (_)for variables? – Veak Oct 02 '22 at 14:25l3kernelwhich is documented source code. Neither is intended as a tutorial, see instead the https://www.alanshawn.com/latex3-tutorial/ I showed above (which is not by the latex team) – David Carlisle Oct 02 '22 at 14:27https://www.latex-project.org/help/documentation/. – Veak Oct 02 '22 at 14:29