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diff --git a/src/guile/skribilo/location.scm b/src/guile/skribilo/location.scm
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+;;; location.scm -- Skribilo source location.
+;;;
+;;; Copyright 2003-2004  Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
+;;; Copyright 2005  Ludovic Courtès <ludovic.courtes@laas.fr>
+;;;
+;;;
+;;; This program is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 2 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program; if not, write to the Free Software
+;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+;;; USA.
+
+(define-module (skribilo location)
+  :use-module (oop goops)
+  :export (<location> location? ast-location
+	   location-file location-line location-pos))
+
+;;; Author:  Ludovic Courtès
+;;;
+;;; Commentary:
+;;;
+;;; An abstract data type to keep track of source locations.
+;;;
+;;; Code:
+
+(read-set! keywords 'prefix)
+
+
+;;;
+;;; Class definition.
+;;;
+
+(define-class <location> ()
+  (file :init-keyword :file :getter location-file)
+  (pos  :init-keyword :pos  :getter location-pos)
+  (line :init-keyword :line :getter location-line))
+
+(define (location? obj)
+  (is-a? obj <location>))
+
+(define (ast-location obj)
+  (let ((loc (slot-ref obj 'loc)))
+    (if (location? loc)
+	(let* ((fname (location-file loc))
+	       (line  (location-line loc))
+	       (pwd   (getcwd))
+	       (len   (string-length pwd))
+	       (lenf  (string-length fname))
+	       (file  (if (and (substring=? pwd fname len)
+			       (> lenf len))
+			  (substring fname len (+ 1 (string-length fname)))
+			  fname)))
+	  (format #f "~a, line ~a" file line))
+	"no source location")))
+
+
+;;; arch-tag: d68fa45d-a200-465e-a3c2-eb2861907f83
+
+;;; location.scm ends here.