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diff --git a/helm/ocaml/content_pres/termContentPres.mli b/helm/ocaml/content_pres/termContentPres.mli
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+(* Copyright (C) 2004-2005, 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/
+ *)
+
+  (** {2 Persistant state handling} *)
+
+type pretty_printer_id
+
+val add_pretty_printer:
+  precedence:int ->
+  associativity:Gramext.g_assoc ->
+  CicNotationPt.term ->             (* level 2 pattern *)
+  CicNotationPt.term ->             (* level 1 pattern *)
+    pretty_printer_id
+
+exception Pretty_printer_not_found
+
+  (** @raise Pretty_printer_not_found *)
+val remove_pretty_printer: pretty_printer_id -> unit
+
+  (** {2 content -> pres} *)
+
+val pp_ast: CicNotationPt.term -> CicNotationPt.term
+
+  (** {2 pres -> content} *)
+
+  (** fills a term pattern instantiating variable magics *)
+val instantiate_level2:
+  CicNotationEnv.t -> CicNotationPt.term ->
+    CicNotationPt.term
+