--- a/src/HOL/Relation.thy Mon Aug 16 14:21:54 2004 +0200
+++ b/src/HOL/Relation.thy Mon Aug 16 14:22:27 2004 +0200
@@ -6,7 +6,9 @@
header {* Relations *}
-theory Relation = Product_Type:
+theory Relation
+import Product_Type
+begin
subsection {* Definitions *}