CTAN Comprehensive TeX Archive Network

CTAN update: expl3

Date: March 30, 2010 5:38:07 PM CEST
that daemon's trying to grind me down: > The following information was provided by the package's contributor. > > Name of contribution: expl3 > Author's name: LaTeX3 Project > Location on CTAN: /macros/latex/contrib/expl3 > Summary description: Packages supporting LaTeX3 programming conventions > License type: lppl > > Announcement text given by the package's contributor: > ---------------------------------------------------------------------- > ---------------------------------------------------------------- > ---------------------------------------------------------------- > The expl3 bundle: Low-level LaTeX3 programming conventions > ---------------------------------------------------------------- > > The files of the expl3 bundle provide a low-level API for TeX > programmers with special syntax conventions, completely > separating it from document level syntax. Hence, the commands > provided are not intended for use at the document level nor for > use in describing design layouts in document class files. > > This API provides the foundation on which the LaTeX3 kernel > and other advanced extensions are built. Special care has been > taken so that they can be used within a LaTeX2e context as > regular packages. > > The TeX and eTeX primitives are all given a new name according > to these conventions. However, in the main direct use of the > primitives is not required or encouraged: the expl3 modules > define an independent low-level LaTeX3 programming language. > > At present, the expl3 modules are designed to be loaded on top > of LaTeX2e: > > \usepackage{expl3} > > In time, a LaTeX3 format will be produced based on this code. > This allows the code to be used in LaTeX2e packages now while a > stand-alone LaTeX3 is developed. > > ---------------------------------------------------------------- > This release (SVN 1881) > ---------------------------------------------------------------- > > As the existing LaTeX3 code is used by more people and for more > purposes, some of the original ideas are being re-examined and > inconsistencies and bugs are being addressed. This release > reflects the consolidation process, which is of course ongoing. > > The robustness of functions has been revised, and all functions > should now be either protected or fully expandable. This is > regarded as a general pattern for LaTeX3: any function which is > not expandable should be defined using \cs_set_protected:Npn, > etc. > > On variables, the definitions for \tl_set:Nn and related > functions now allow "#" tokens in token lists, for example: > > \tl_set:Nn \l_my_tl { single~#~token! } > > We hope that this means that token registers (toks) functions > are needed for the small number of primitive token registers > and for LaTeX2e work only. Feedback on this change is very > welcome. > > The file and keyval modules have been revised to provide > only "higher-level" functions for general use. The lower > level functions are either renamed, removed or not documented, > and the intention is that everything will be done via the > documented functions. > > In l3msg, \msg_set:nnnn, etc., now read messages with expl3 > category codes (spaces are ignored). While this requires a > little more typing we feel that the consistency it brings is > valuble. > > One area of active discussion is whether register creation > should be local or global. This release includes *experimental* > support for locally-created registers using the > \<var>_new_local:N functions. Be warned that this concept is > included for discussion and may not be retained in the longer > term. > > There are a number of other minor changes, as the team are > hard at work in a number of areas. > > ---------------------------------------------------------------- > The LaTeX3 Project > ---------------------------------------------------------------- > ---------------------------------------------------------------- i have installed the new version and updated the catalogue repository. thanks for the upload. > ---------------------------------------------------------------------- > > Users may view the package catalogue entry at > http://www.tex.ac.uk/tex-archive/help/Catalogue/entries/expl3.html > or they may browse the package directory at > http://www.tex.ac.uk/tex-archive/macros/latex/contrib/expl3 the catalogue entry will change a bit, overnight tonight. Robin Fairbairns For the CTAN team

expl3 – Wrapper package for experimental 3

The package serves as a wrapper for other packages that make up the 3 kernel distribution.

The package is distributed as part of the 3 kernel distribution.

Version 2022-11-02
Copyright1990–2022 The 3 Project
MaintainerThe Project Team



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