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diff --git a/helm/ocaml/grafite_engine/grafiteTypes.ml b/helm/ocaml/grafite_engine/grafiteTypes.ml
deleted file mode 100644
index 0c02e1b6c..000000000
--- a/helm/ocaml/grafite_engine/grafiteTypes.ml
+++ /dev/null
@@ -1,195 +0,0 @@
-(* 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/
- *)
-
-(* $Id$ *)
-
-exception Option_error of string * string
-exception Statement_error of string
-exception Command_error of string
-
-let command_error msg = raise (Command_error msg)
-
-type incomplete_proof = {
-  proof: ProofEngineTypes.proof;
-  stack: Continuationals.Stack.t;
-}
-
-type proof_status =
-  | No_proof
-  | Incomplete_proof of incomplete_proof
-  | Proof of ProofEngineTypes.proof
-  | Intermediate of Cic.metasenv
-      (* Status in which the proof could be while it is being processed by the
-      * engine. No status entering/exiting the engine could be in it. *)
-
-module StringMap = Map.Make (String)
-type option_value =
-  | String of string
-  | Int of int
-type options = option_value StringMap.t
-let no_options = StringMap.empty
-
-type status = {
-  moo_content_rev: GrafiteMarshal.moo;
-  proof_status: proof_status;
-  options: options;
-  objects: UriManager.uri list;
-  coercions: UriManager.uri list;
-}
-
-let get_current_proof status =
-  match status.proof_status with
-  | Incomplete_proof { proof = p } -> p
-  | _ -> raise (Statement_error "no ongoing proof")
-
-let get_proof_metasenv status =
-  match status.proof_status with
-  | No_proof -> []
-  | Proof (_, metasenv, _, _)
-  | Incomplete_proof { proof = (_, metasenv, _, _) }
-  | Intermediate metasenv ->
-      metasenv
-
-let get_stack status =
-  match status.proof_status with
-  | Incomplete_proof p -> p.stack
-  | Proof _ -> Continuationals.Stack.empty
-  | _ -> assert false
-
-let set_stack stack status =
-  match status.proof_status with
-  | Incomplete_proof p ->
-      { status with proof_status = Incomplete_proof { p with stack = stack } }
-  | Proof _ ->
-      assert (Continuationals.Stack.is_empty stack);
-      status
-  | _ -> assert false
-
-let set_metasenv metasenv status =
-  let proof_status =
-    match status.proof_status with
-    | No_proof -> Intermediate metasenv
-    | Incomplete_proof ({ proof = (uri, _, proof, ty) } as incomplete_proof) ->
-        Incomplete_proof
-          { incomplete_proof with proof = (uri, metasenv, proof, ty) }
-    | Intermediate _ -> Intermediate metasenv 
-    | Proof (_, metasenv', _, _) ->
-       assert (metasenv = metasenv');
-       status.proof_status
-  in
-  { status with proof_status = proof_status }
-
-let get_proof_context status goal =
-  match status.proof_status with
-  | Incomplete_proof { proof = (_, metasenv, _, _) } ->
-      let (_, context, _) = CicUtil.lookup_meta goal metasenv in
-      context
-  | _ -> []
-
-let get_proof_conclusion status goal =
-  match status.proof_status with
-  | Incomplete_proof { proof = (_, metasenv, _, _) } ->
-      let (_, _, conclusion) = CicUtil.lookup_meta goal metasenv in
-      conclusion
-  | _ -> raise (Statement_error "no ongoing proof")
- 
-let add_moo_content cmds status =
-  let content = status.moo_content_rev in
-  let content' =
-    List.fold_right
-      (fun cmd acc ->
-(*         prerr_endline ("adding to moo command: " ^ GrafiteAstPp.pp_command cmd); *)
-        match cmd with
-        | GrafiteAst.Default _ ->
-            if List.mem cmd content then acc
-            else cmd :: acc
-        | _ -> cmd :: acc)
-      cmds content
-  in
-(*   prerr_endline ("new moo content: " ^ String.concat " " (List.map
-    GrafiteAstPp.pp_command content')); *)
-  { status with moo_content_rev = content' }
-
-let get_option status name =
-  try
-    StringMap.find name status.options
-  with Not_found -> raise (Option_error (name, "not found"))
-
-let set_option status name value =
-  let mangle_dir s =
-    let s = Str.global_replace (Str.regexp "//+") "/" s in
-    let s = Str.global_replace (Str.regexp "/$") "" s in
-    s
-  in
-  let types = [ "baseuri", (`String, mangle_dir); ] in
-  let ty_and_mangler =
-    try
-      List.assoc name types
-    with Not_found ->
-     command_error (Printf.sprintf "Unknown option \"%s\"" name)
-  in
-  let value =
-    match ty_and_mangler with
-    | `String, f -> String (f value)
-    | `Int, f ->
-        (try
-          Int (int_of_string (f value))
-        with Failure _ ->
-          command_error (Printf.sprintf "Not an integer value \"%s\"" value))
-  in
-  if StringMap.mem name status.options && name = "baseuri" then
-    command_error "Redefinition of 'baseuri' is forbidden."
-  else
-    { status with options = StringMap.add name value status.options }
-
-
-let get_string_option status name =
-  match get_option status name with
-  | String s -> s
-  | _ -> raise (Option_error (name, "not a string value"))
-
-let qualify status name = get_string_option status "baseuri" ^ "/" ^ name
-
-let dump_status status = 
-  HLog.message "status.aliases:\n";
-  HLog.message "status.proof_status:"; 
-  HLog.message
-    (match status.proof_status with
-    | No_proof -> "no proof\n"
-    | Incomplete_proof _ -> "incomplete proof\n"
-    | Proof _ -> "proof\n"
-    | Intermediate _ -> "Intermediate\n");
-  HLog.message "status.options\n";
-  StringMap.iter (fun k v -> 
-    let v = 
-      match v with
-      | String s -> s
-      | Int i -> string_of_int i
-    in
-    HLog.message (k ^ "::=" ^ v)) status.options;
-  HLog.message "status.coercions\n";
-  HLog.message "status.objects:\n";
-  List.iter 
-    (fun u -> HLog.message (UriManager.string_of_uri u)) status.objects