From the web site: Tuareg is a Caml mode for GNU Emacs and XEmacs. It handles automatic indentation of Objective Caml and Camllight codes. Key parts of the code are hilighted using Font-Lock. Support to run an interactive Caml toplevel and debbuger is provided. This mode attempts to give better results than the one provided in the standard distribution OCaml 3.x. Indentation rules are slightly different but closer to classical functional languages. There is no relation with the Tuareg People, except their reputation of great CAMEL riders and breeders. Documentation is installed into share/doc/tuareg-mode