diff -r 971d1be5d5ce -r 731b18266d5a NEWS
--- a/NEWS	Thu Aug 18 16:52:19 2011 +0900
+++ b/NEWS	Thu Aug 18 17:42:18 2011 +0200
@@ -57,6 +57,9 @@
 * Isabelle/Isar reference manual provides more formal references in
 syntax diagrams.
 
+* Attribute case_names has been refined: the assumptions in each case can
+be named now by following the case name with [name1 name2 ...].
+
 
 *** HOL ***