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diff --git a/components/cic_proof_checking/cicTypeChecker.mli b/components/cic_proof_checking/cicTypeChecker.mli
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+(* Copyright (C) 2000, 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://cs.unibo.it/helm/.
+ *)
+
+(* These are the only exceptions that will be raised *)
+exception TypeCheckerFailure of string Lazy.t
+exception AssertFailure of string Lazy.t
+
+(* this function is exported to be used also by the refiner;
+   the callback function (defaul value: ignore) is invoked on each
+   processed subterm; its first argument is the undebrujined term (the
+   input); its second argument the corresponding debrujined term (the
+   output). The callback is used to relocalize the error messages *)
+val debrujin_constructor :
+ ?cb:(Cic.term -> Cic.term -> unit) ->
+ ?check_exp_named_subst: bool ->
+  UriManager.uri -> int -> Cic.context -> Cic.term -> Cic.term
+
+val typecheck : UriManager.uri -> Cic.obj * CicUniv.universe_graph
+
+(* FUNCTIONS USED ONLY IN THE TOPLEVEL *)
+
+(* type_of_aux' metasenv context term *)
+val type_of_aux':
+  ?subst:Cic.substitution -> Cic.metasenv -> Cic.context -> 
+  Cic.term -> CicUniv.universe_graph -> 
+  Cic.term * CicUniv.universe_graph
+
+(* typechecks the obj and puts it in the environment *)
+val typecheck_obj : UriManager.uri -> Cic.obj -> unit
+
+(* check_allowed_sort_elimination uri i s1 s2
+   This function is used outside the kernel to determine in advance whether
+   a MutCase will be allowed or not.
+   [uri,i] is the type of the term to match
+   [s1] is the sort of the term to eliminate (i.e. the head of the arity
+        of the inductive type [uri,i])
+   [s2] is the sort of the goal (i.e. the head of the type of the outtype
+        of the MutCase) *)
+val check_allowed_sort_elimination:
+ UriManager.uri -> int -> Cic.sort -> Cic.sort -> bool
+
+(* does_not_occur ~subst context n nn t
+   checks if the semi-open interval of Rels (n,nn] occurs in t *)
+val does_not_occur:
+ ?subst:Cic.substitution -> Cic.context -> int -> int -> Cic.term -> bool