src/Pure/ROOT.scala

   val commas = Library.commas _
   val commas_quote = Library.commas_quote _
   def proper[A](x: A): Option[A] = Library.proper(x)
   val proper_string = Library.proper_string _
   def proper_list[A](list: List[A]): Option[List[A]] = Library.proper_list(list)
+
+  type UUID = java.util.UUID
+  def UUID(): UUID = java.util.UUID.randomUUID()
 }