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diff --git a/helm/ocaml/cic_disambiguation/disambiguateTypes.ml b/helm/ocaml/cic_disambiguation/disambiguateTypes.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/
+ *)
+
+(* $Id$ *)
+
+(*
+type term = CicNotationPt.term
+type tactic = (term, term, GrafiteAst.reduction, string) GrafiteAst.tactic
+type tactical = (term, term, GrafiteAst.reduction, string) GrafiteAst.tactical
+type script_entry =
+  | Command of tactical
+  | Comment of CicNotationPt.location * string
+type script = CicNotationPt.location * script_entry list
+*)
+
+type domain_item =
+  | Id of string               (* literal *)
+  | Symbol of string * int     (* literal, instance num *)
+  | Num of int                 (* instance num *)
+
+exception Invalid_choice of string Lazy.t
+
+module OrderedDomain =
+  struct
+    type t = domain_item
+    let compare = Pervasives.compare
+  end
+
+(* module Domain = Set.Make (OrderedDomain) *)
+module Environment =
+struct
+  module Environment' = Map.Make (OrderedDomain)
+
+  include Environment'
+
+  let cons k v env =
+    try
+      let current = find k env in
+      let dsc, _ = v in
+      add k (v :: (List.filter (fun (dsc', _) -> dsc' <> dsc) current)) env
+    with Not_found ->
+      add k [v] env
+
+  let hd list_env =
+    try
+      map List.hd list_env
+    with Failure _ -> assert false
+
+  let fold_flatten f env base =
+    fold
+      (fun k l acc -> List.fold_right (fun v acc -> f k v acc) l acc)
+      env base
+
+end
+
+type codomain_item =
+  string *  (* description *)
+  (environment -> string -> Cic.term list -> Cic.term)
+    (* environment, literal number, arguments as needed *)
+
+and environment = codomain_item Environment.t
+
+type multiple_environment = codomain_item list Environment.t
+
+
+(** adds a (name,uri) list l to a disambiguation environment e **)
+let multiple_env_of_list l e = 
+  List.fold_left
+   (fun e (name,descr,t) -> Environment.cons (Id name) (descr,fun _ _ _ -> t) e)
+   e l
+
+let env_of_list l e = 
+  List.fold_left
+   (fun e (name,descr,t) -> Environment.add (Id name) (descr,fun _ _ _ -> t) e)
+   e l
+
+module type Callbacks =
+  sig
+    val interactive_user_uri_choice:
+      selection_mode:[`SINGLE | `MULTIPLE] ->
+      ?ok:string ->
+      ?enable_button_for_non_vars:bool ->
+      title:string -> msg:string -> id:string -> UriManager.uri list ->
+      UriManager.uri list
+    val interactive_interpretation_choice:
+      (string * string) list list -> int list
+    val input_or_locate_uri:
+      title:string -> ?id:string -> unit -> UriManager.uri
+  end
+
+let string_of_domain_item = function
+  | Id s -> Printf.sprintf "ID(%s)" s
+  | Symbol (s, i) -> Printf.sprintf "SYMBOL(%s,%d)" s i
+  | Num i -> Printf.sprintf "NUM(instance %d)" i
+
+let string_of_domain dom =
+  String.concat "; " (List.map string_of_domain_item dom)