diff -r 64da21a2c6c7 -r 349e9223c685 src/Pure/General/markup.scala
--- a/src/Pure/General/markup.scala	Sat May 29 17:26:02 2010 +0200
+++ b/src/Pure/General/markup.scala	Sat May 29 19:46:29 2010 +0200
@@ -172,6 +172,8 @@
 
   val UNPROCESSED = "unprocessed"
   val RUNNING = "running"
+  val FORKED = "forked"
+  val JOINED = "joined"
   val FAILED = "failed"
   val FINISHED = "finished"
   val DISPOSED = "disposed"