The LaTeX3 Development Repository
The repository contains development material for LaTeX3. This includes not only code to be developed into the LaTeX3 kernel, but also a variety of test, documentation and more experimental material. A great deal of the experimental LaTeX3 code can be loaded within LaTeX2e to allow development and testing to occur.
The following directories contain experimental LaTeX3 code:
l3kernel: code which is intended to eventually appear in a stand-alone LaTeX3 format. Most of this material is also usable on top of LaTeX2e when loading the
l3backend: code for backend (driver) level interaces across the
l3packages: code which is written to be used on top of LaTeX2e to experiment with LaTeX3 concepts. The interfaces to these higher-level packages are 'stable'.
l3experimental: code which is written to be used on top of LaTeX2e to experiment with LaTeX3 concepts. The interfaces for these packages are still under active discussion. Parts of this code may eventually be migrated to
l3kernel, while other parts are tied closely to LaTeX2e and are intended to support mixing LaTeX2e and LaTeX3 concepts.
l3trial: material which is under very active development, for potential addition to
l3experimental. Material in this directory may include potential replacements for existing modules, where large-scale changes are under-way.
l3leftovers: code which has been developed in the past by The LaTeX3 Project but is not suitable for use in its current form. Parts of this code may be used as the basis for new developments in
Support material for development is found in:
support, which contains files for the automated test suite which are 'local' to the LaTeX3 repository.
Documentation is found in:
articles: discussion of LaTeX3 concepts by team members for publication in TUGBoat or elsewhere.
The repository also contains the directory
contain code which is being moved (broadly)
xpackages is expected to be removed from the repository.
contrib is used to test the interaction of LaTeX3
code with selected contributed packages.
Discussion concerning the approach, suggestions for improvements, changes, additions, etc. should be addressed to the list LaTeX-L.
You can subscribe to this list by sending mail to
with the body containing
subscribe LATEX-L <Your-First-Name> <Your-Second-Name>
The issue tracker for LaTeX3 is currently located on GitHub.
Please report specific issues with LaTeX3 code there; more general discussion should be directed to the LaTeX-L list.
LaTeX3 uses Travis CI as a hosted continuous integration service. For each commit, the build status is tested using the current release of TeX Live.
LaTeX3 is developed by The LaTeX3 Project.
This README file is copyright 2019 The LaTeX3 Project.