--- /dev/null
+(* Copyright (C) 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/
+ *)
+
+type notation_id
+
+val process_notation: LexiconAst.command -> notation_id list
+
+val remove_notation: notation_id -> unit
+
+(** {2 Notation enabling/disabling}
+ * Right now, only disabling of notation during pretty printing is supporting.
+ * If it is useful to disable it also for the input phase is still to be
+ * understood ... *)
+
+val get_all_notations: unit -> (notation_id * string) list (* id, dsc *)
+val get_active_notations: unit -> notation_id list
+val set_active_notations: notation_id list -> unit
+