diff -r 3e8420c1124a -r fe044b49e34f src/Pure/General/markup.scala
--- a/src/Pure/General/markup.scala	Wed Jan 14 19:38:55 2009 +0100
+++ b/src/Pure/General/markup.scala	Thu Jan 15 00:41:24 2009 +0100
@@ -117,6 +117,7 @@
   val FAILED = "failed"
   val FINISHED = "finished"
   val DISPOSED = "disposed"
+  val COMMAND_STATE = "command_state"
 
 
   /* messages */