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diff --git a/interp/syntax_def.ml b/interp/syntax_def.ml
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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(* $Id: syntax_def.ml,v 1.6.2.1 2004/07/16 19:30:23 herbelin Exp $ *)
+
+open Util
+open Pp
+open Names
+open Libnames
+open Topconstr
+open Libobject
+open Lib
+open Nameops
+
+(* Syntactic definitions. *)
+
+let syntax_table = ref (KNmap.empty : aconstr KNmap.t)
+
+let _ = Summary.declare_summary
+	  "SYNTAXCONSTANT"
+	  { Summary.freeze_function = (fun () -> !syntax_table);
+	    Summary.unfreeze_function = (fun ft -> syntax_table := ft);
+	    Summary.init_function = (fun () -> syntax_table := KNmap.empty);
+	    Summary.survive_module = false;
+	    Summary.survive_section = false }
+
+let add_syntax_constant kn c =
+  syntax_table := KNmap.add kn c !syntax_table
+
+let load_syntax_constant i ((sp,kn),(local,c,onlyparse)) =
+  if Nametab.exists_cci sp then
+    errorlabstrm "cache_syntax_constant"
+      (pr_id (basename sp) ++ str " already exists");
+  add_syntax_constant kn c;
+  Nametab.push_syntactic_definition (Nametab.Until i) sp kn;
+  if not onlyparse then
+    Symbols.declare_uninterpretation (Symbols.SynDefRule kn) ([],c)
+
+let open_syntax_constant i ((sp,kn),c) =
+  Nametab.push_syntactic_definition (Nametab.Exactly i) sp kn
+
+let cache_syntax_constant d =
+  load_syntax_constant 1 d
+
+let subst_syntax_constant ((sp,kn),subst,(local,c,onlyparse)) =
+  (local,subst_aconstr subst c,onlyparse)
+
+let classify_syntax_constant (_,(local,_,_ as o)) =
+  if local then Dispose else Substitute o
+
+let export_syntax_constant (local,_,_ as o) =
+  if local then None else Some o
+
+let (in_syntax_constant, out_syntax_constant) =
+  declare_object {(default_object "SYNTAXCONSTANT") with
+    cache_function = cache_syntax_constant;
+    load_function = load_syntax_constant;
+    open_function = open_syntax_constant;
+    subst_function = subst_syntax_constant;
+    classify_function = classify_syntax_constant;
+    export_function = export_syntax_constant } 
+
+let declare_syntactic_definition local id onlyparse c =
+  let _ = add_leaf id (in_syntax_constant (local,c,onlyparse)) in ()
+
+let rec set_loc loc _ a =
+  rawconstr_of_aconstr_with_binders loc (fun id e -> (id,e)) (set_loc loc) () a
+
+let search_syntactic_definition loc kn =
+  set_loc loc () (KNmap.find kn !syntax_table)