added top and bot syntax

--- a/src/HOL/Library/Lattice_Syntax.thy	Sun Mar 08 15:25:28 2009 +0100
+++ b/src/HOL/Library/Lattice_Syntax.thy	Sun Mar 08 15:25:29 2009 +0100
@@ -11,7 +11,9 @@
   inf  (infixl "\<sqinter>" 70) and
   sup  (infixl "\<squnion>" 65) and
   Inf  ("\<Sqinter>_" [900] 900) and
-  Sup  ("\<Squnion>_" [900] 900)
+  Sup  ("\<Squnion>_" [900] 900) and
+  top ("\<top>") and
+  bot ("\<bottom>")
 
 end
 (*>*)
\ No newline at end of file