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diff --git a/parsing/notation_gram.ml b/parsing/notation_gram.ml
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+(************************************************************************)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
+(*   \VV/  **************************************************************)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+open Names
+open Extend
+
+(** Dealing with precedences *)
+
+type precedence = int
+type parenRelation = L | E | Any | Prec of precedence
+type tolerability = precedence * parenRelation
+
+type level = Constrexpr.notation_entry * precedence * tolerability list * constr_entry_key list
+  (* first argument is InCustomEntry s for custom entries *)
+
+type grammar_constr_prod_item =
+  | GramConstrTerminal of Tok.t
+  | GramConstrNonTerminal of Extend.constr_prod_entry_key * Id.t option
+  | GramConstrListMark of int * bool * int
+    (* tells action rule to make a list of the n previous parsed items;
+       concat with last parsed list when true; additionally release
+       the p last items as if they were parsed autonomously *)
+
+(** Grammar rules for a notation *)
+
+type one_notation_grammar = {
+  notgram_level : level;
+  notgram_assoc : Extend.gram_assoc option;
+  notgram_notation : Constrexpr.notation;
+  notgram_prods : grammar_constr_prod_item list list;
+}
+
+type notation_grammar = {
+  notgram_onlyprinting : bool;
+  notgram_rules : one_notation_grammar list
+}