D LATEX Programming
In this appendix, we present the special commands that were designed for class and package files along with some convenient internal LATEX and TEX commands.
D.1 Class and package files
D.1.1 The LATEX concept, an open system
The wealth of contributed LATEX programming was probably never anticipated by Leslie Lamport when he released LATEX. It is now a fact of life, and indeed one of the great strengths of the system. The LATEX Team not only accommodates such ‘foreign’ extensions, it actually supports and encourages them, as witnessed by the copious presentations of such packages in The LATEX Companion (Mittelbach et al., 2004) as well as in this book.
And this is the way it should be. The extensions have been written by ...