diff --git a/lstlang0.sty b/lstlang0.sty
index 97d2d02..48e7b62 100755
--- a/lstlang0.sty
+++ b/lstlang0.sty
@@ -1,3 +1,11 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% File: $Id$
+%
+% Listings language definitions used in the ouexam examples.
+%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
 \lst@definelanguage{ODL}%
 {	morekeywords={class,extent,key,keys,module,interface,const,true,false,%
 		typedef,date,time,interval,timestamp,dictionary,set,list,bag,float,%