Here's a little tutorial on text processing with emacs lisp.

I want to use elisp to create a sitemap. More specifically, generate a list all files of a given directory including its subdirectories, for each file create a url string in some particualr XML form, and put the whole result into a file with proper header and footer texts.

HTML version with syntax coloring and links is at: http://xahlee.org/emacs/make_sitemap.html

livejournal screws up raw html source code so no text version here.

Also, my emacs and elisp tutorial is now downladable. Download link at bottom of http://xahlee.org/emacs/emacs.html