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diff --git a/matita/components/syntax_extensions/utf8Macro.ml b/matita/components/syntax_extensions/utf8Macro.ml
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+++ b/matita/components/syntax_extensions/utf8Macro.ml
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+(* Copyright (C) 2004, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM 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.
+ * 
+ * HELM 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 HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+(* $Id$ *)
+
+exception Macro_not_found of string
+exception Utf8_not_found of string
+
+let expand macro =
+  try
+    Hashtbl.find Utf8MacroTable.macro2utf8 macro
+  with Not_found -> raise (Macro_not_found macro)
+
+let unicode_of_tex s =
+  try
+    if s.[0] = '\\' then
+      expand (String.sub s 1 (String.length s - 1))
+    else s
+  with Macro_not_found _ -> s
+
+let tex_of_unicode s =
+ (*WARNING: the space below is a nbsp (0x00A0), not a normal space *)
+ if s = " " then [""]
+ else
+  try
+    let alt = 
+      List.map (fun x -> "\\"^x) 
+       (Hashtbl.find_all Utf8MacroTable.utf82macro s)
+    in
+    List.sort 
+      (fun x y -> Pervasives.compare (String.length x) (String.length y)) 
+      alt
+  with Not_found -> []
+
+let pp_table () =
+  let rec list_uniq ?(eq=(=)) = function 
+    | [] -> []
+    | h::[] -> [h]
+    | h1::h2::tl when eq h1 h2 -> list_uniq ~eq (h2 :: tl) 
+    | h1::tl (* when h1 <> h2 *) -> h1 :: list_uniq ~eq tl
+  in
+  let l = ref [] in
+  Hashtbl.iter (fun k _ -> l := k :: !l) Utf8MacroTable.utf82macro;
+  l := list_uniq (List.sort compare !l);
+  List.map 
+    (fun k -> 
+       let vs = Hashtbl.find_all Utf8MacroTable.utf82macro k in
+       (k, List.map (fun x -> "\\"^x) vs))
+    !l
+;;