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diff --git a/library/kindops.ml b/library/kindops.ml
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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2015     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+open Decl_kinds
+
+(** Operations about types defined in [Decl_kinds] *)
+
+let logical_kind_of_goal_kind = function
+  | DefinitionBody d -> IsDefinition d
+  | Proof s -> IsProof s
+
+let string_of_theorem_kind = function
+  | Theorem -> "Theorem"
+  | Lemma -> "Lemma"
+  | Fact -> "Fact"
+  | Remark -> "Remark"
+  | Property -> "Property"
+  | Proposition -> "Proposition"
+  | Corollary -> "Corollary"
+
+let string_of_definition_kind def =
+  let (locality, poly, kind) = def in
+  let error () = Errors.anomaly (Pp.str "Internal definition kind") in
+  match kind with
+  | Definition ->
+    begin match locality with
+    | Discharge -> "Let"
+    | Local -> "Local Definition"
+    | Global -> "Definition"
+    end
+  | Example ->
+    begin match locality with
+    | Discharge -> error ()
+    | Local -> "Local Example"
+    | Global -> "Example"
+    end
+  | Coercion ->
+    begin match locality with
+    | Discharge -> error ()
+    | Local -> "Local Coercion"
+    | Global -> "Coercion"
+    end
+  | SubClass ->
+    begin match locality with
+    | Discharge -> error ()
+    | Local -> "Local SubClass"
+    | Global -> "SubClass"
+    end
+  | CanonicalStructure ->
+    begin match locality with
+    | Discharge -> error ()
+    | Local -> error ()
+    | Global -> "Canonical Structure"
+    end
+  | Instance ->
+    begin match locality with
+    | Discharge -> error ()
+    | Local -> "Instance"
+    | Global -> "Global Instance"
+    end
+  | (StructureComponent|Scheme|CoFixpoint|Fixpoint|IdentityCoercion|Method) ->
+    Errors.anomaly (Pp.str "Internal definition kind")