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Subject: Re: different modes for file with same extension?
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stig <nospam_stigerikson@yahoo.se> writes:

> is it possible to set up emacs to understand that two files with the same 
> extension are actually written in two different programming languages?
> 
> perl = .pl
> prolog = .pl
> 
> same extensions, but very different code.
> 
> would it be possible, and in that case how?

Make your first line in the file like this:

<comment specific to that mode> -*- mode: <mode-name> -*-

for example:

;; -*- mode: emacs-lisp -*-

or

// -*- mode: java -*-

-- 
Luke Olbrish
<luke.olbrish@cc.gatech.edu>