Welcome to the UK List of
TeX Frequently Asked Questions
on the Web

As yet, there is no book “Programming in LaTeX3”, and even if such a thing existed there would be lots of gaps. So there is no comprehensive support.

However, there are some ‘resources’:

• The “introduction to LaTeX3 ideas” in the expl3 documentation gives a broad-brush overview of the concepts.
• Joseph Wright has written a short series of blog posts, which may help.
• There is also a complete command reference in the interface3 document.

The documents are still subject to development; some of the broader design issues are discussed on the LaTeX mailing list latex-l — you may subscribe to that list by sending a message by sending a message

‘subscribe latex-l <your name>’

to listserv@urz.Uni-Heidelberg.de