src/Pure/sign.ML

--- a/src/Pure/sign.ML	Wed Jan 16 23:18:20 2002 +0100
+++ b/src/Pure/sign.ML	Wed Jan 16 23:19:34 2002 +0100
@@ -1,6 +1,7 @@
 (*  Title:      Pure/sign.ML
     ID:         $Id$
     Author:     Lawrence C Paulson and Markus Wenzel
+    License:    GPL (GNU GENERAL PUBLIC LICENSE)
 
 The abstract type "sg" of signatures.
 *)