The xpackages is a bundle of prototype implementations of new concepts for a LaTeX Designer Interface, used in the first instance with the experimental LaTeX 3 workbench expl3.

The bundle contains:
– ldcsetup, which establishes an environment for the other packages;
– template and xtemplate, which define template functions from which instances may be derived;
– xparse, which permits flexible specifications of command arguments;
– xhead, which contains basic templates for generating headings at various levels; and
– xcoffins, which allows the alignment of boxes using a series of ‘handle’ positions, supplementing the simple TeX reference point.

In addition, the package l3keys2e provides an interface whereby LaTeX 2e programs may use the experimental LaTeX 3 keys package, l3keys.

The author is The LaTeX Team. The package is Copyright © 2010 Frank Mittelbach, The LaTeX3 Project.