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diff --git a/helm/ocaml/grafite/grafiteMarshal.ml b/helm/ocaml/grafite/grafiteMarshal.ml
new file mode 100644
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+++ b/helm/ocaml/grafite/grafiteMarshal.ml
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+(* 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/
+ *)
+
+(* $Id$ *)
+
+type ast_command = Cic.obj GrafiteAst.command
+type moo = ast_command list
+
+let format_name = "grafite"
+
+let save_moo_to_file ~fname moo =
+  HMarshal.save ~fmt:format_name ~version:GrafiteAst.magic ~fname moo
+
+let load_moo_from_file ~fname =
+  let raw = HMarshal.load ~fmt:format_name ~version:GrafiteAst.magic ~fname in
+  (raw: moo)
+
+let rehash_cmd_uris =
+  let rehash_uri uri =
+    UriManager.uri_of_string (UriManager.string_of_uri uri) in
+  function
+  | GrafiteAst.Default (loc, name, uris) ->
+      let uris = List.map rehash_uri uris in
+      GrafiteAst.Default (loc, name, uris)
+  | GrafiteAst.Coercion (loc, uri, close) ->
+      GrafiteAst.Coercion (loc, rehash_uri uri, close)
+  | cmd ->
+      prerr_endline "Found a command not expected in a .moo:";
+      let obj_pp _ = assert false in
+      prerr_endline (GrafiteAstPp.pp_command ~obj_pp cmd);
+      assert false
+
+let save_moo ~fname moo = save_moo_to_file ~fname (List.rev moo)
+
+let load_moo ~fname =
+  let moo = load_moo_from_file ~fname in
+  List.map rehash_cmd_uris moo
+