--- a/src/HOL/Set.thy Mon Aug 16 14:21:54 2004 +0200
+++ b/src/HOL/Set.thy Mon Aug 16 14:22:27 2004 +0200
@@ -5,7 +5,9 @@
header {* Set theory for higher-order logic *}
-theory Set = HOL:
+theory Set
+import HOL
+begin
text {* A set in HOL is simply a predicate. *}