Added header.

--- a/IOA/ROOT.ML	Tue Nov 08 11:21:33 1994 +0100
+++ b/IOA/ROOT.ML	Wed Nov 09 19:50:36 1994 +0100
@@ -1,3 +1,21 @@
+(*  Title:      HOL/IOA/ROOT.ML
+    ID:         $Id$
+    Author:     Tobias Nipkow & Konrad Slind
+    Copyright   1994  TU Muenchen
+
+This is the ROOT file for the theory of I/O-Automata.
+The formalization is by a semantic model of I/O-Automata.
+For details see
+
+@unpublished{Nipkow-Slind-IOA,
+author={Tobias Nipkow and Konrad Slind},
+title={{I/O} Automata in {Isabelle/HOL}},
+year=1994,
+note={Submitted for publication}}
+ftp://ftp.informatik.tu-muenchen.de/local/lehrstuhl/nipkow/ioa.ps.gz
+
+Should be executed in the subdirectory HOL.
+*)
 goals_limit := 1;
 
 loadpath := "IOA/meta_theory" :: "IOA/example" :: !loadpath;