diff -r 151e76f0e3c7 -r bcf7544875b2 src/CCL/Hered.thy
--- a/src/CCL/Hered.thy	Sat Sep 17 14:02:31 2005 +0200
+++ b/src/CCL/Hered.thy	Sat Sep 17 17:35:26 2005 +0200
@@ -1,30 +1,35 @@
-(*  Title:      CCL/hered.thy
+(*  Title:      CCL/Hered.thy
     ID:         $Id$
     Author:     Martin Coen
     Copyright   1993  University of Cambridge
-
-Hereditary Termination - cf. Martin Lo\"f
-
-Note that this is based on an untyped equality and so lam x.b(x) is only 
-hereditarily terminating if ALL x.b(x) is.  Not so useful for functions!
-
 *)
 
-Hered = Type +
+header {* Hereditary Termination -- cf. Martin Lo\"f *}
+
+theory Hered
+imports Type
+uses "coinduction.ML"
+begin
+
+text {*
+  Note that this is based on an untyped equality and so @{text "lam
+  x. b(x)"} is only hereditarily terminating if @{text "ALL x. b(x)"}
+  is.  Not so useful for functions!
+*}
 
 consts
       (*** Predicates ***)
   HTTgen     ::       "i set => i set"
   HTT        ::       "i set"
 
-
-rules
-
+axioms
   (*** Definitions of Hereditary Termination ***)
 
-  HTTgen_def 
-  "HTTgen(R) == {t. t=true | t=false | (EX a b. t=<a,b>      & a : R & b : R) | 
+  HTTgen_def:
+  "HTTgen(R) == {t. t=true | t=false | (EX a b. t=<a,b>      & a : R & b : R) |
                                       (EX f.  t=lam x. f(x) & (ALL x. f(x) : R))}"
-  HTT_def       "HTT == gfp(HTTgen)"
+  HTT_def:       "HTT == gfp(HTTgen)"
+
+ML {* use_legacy_bindings (the_context ()) *}
 
 end