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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 1999-2010     *)
+(*   \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 =
+  match def with
+  | Local, Coercion -> "Coercion Local"
+  | Global, Coercion -> "Coercion"
+  | Local, Definition -> "Let"
+  | Global, Definition -> "Definition"
+  | Local, SubClass -> "Local SubClass"
+  | Global, SubClass -> "SubClass"
+  | Global, CanonicalStructure -> "Canonical Structure"
+  | Global, Example -> "Example"
+  | Local, (CanonicalStructure|Example) ->
+      Errors.anomaly "Unsupported local definition kind"
+  | Local, Instance -> "Instance"
+  | Global, Instance -> "Global Instance"
+  | _, (StructureComponent|Scheme|CoFixpoint|Fixpoint|IdentityCoercion|Method)
+      -> Errors.anomaly "Internal definition kind"