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diff --git a/library/decl_kinds.mli b/library/decl_kinds.mli
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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: decl_kinds.mli 11024 2008-05-30 12:41:39Z msozeau $ *)
+
+open Util
+open Libnames
+
+(* Informal mathematical status of declarations *)
+
+type locality =
+  | Local
+  | Global
+
+type boxed_flag = bool
+
+type theorem_kind =
+  | Theorem
+  | Lemma
+  | Fact
+  | Remark
+  | Property
+  | Proposition
+  | Corollary
+
+type definition_object_kind =
+  | Definition
+  | Coercion
+  | SubClass
+  | CanonicalStructure
+  | Example
+  | Fixpoint
+  | CoFixpoint
+  | Scheme
+  | StructureComponent
+  | IdentityCoercion
+  | Instance
+  | Method
+
+type assumption_object_kind = Definitional | Logical | Conjectural
+
+(* [assumption_kind] 
+
+                |  Local      | Global
+   ------------------------------------
+   Definitional |  Variable   | Parameter
+   Logical      |  Hypothesis | Axiom
+
+*)
+type assumption_kind = locality * assumption_object_kind
+
+type definition_kind = locality * boxed_flag * definition_object_kind
+
+(* Kinds used in proofs *)
+
+type goal_object_kind =
+  | DefinitionBody of definition_object_kind
+  | Proof of theorem_kind
+
+type goal_kind = locality * goal_object_kind
+
+(* Kinds used in library *)
+
+type logical_kind =
+  | IsAssumption of assumption_object_kind
+  | IsDefinition of definition_object_kind
+  | IsProof of theorem_kind
+
+(* Utils *)
+
+val logical_kind_of_goal_kind : goal_object_kind -> logical_kind
+val string_of_theorem_kind : theorem_kind -> string
+val string_of_definition_kind :
+  locality * boxed_flag * definition_object_kind -> string
+
+(* About locality *)
+
+val strength_of_global : global_reference -> locality
+val string_of_strength : locality -> string