--- a/opera.xml	Mon Dec 26 19:21:22 2005 -0500
+++ b/opera.xml	Fri Dec 30 19:55:24 2005 -0500
@@ -1,6 +1,7 @@
 <?xml version='1.0'?>
-<!DOCTYPE article PUBLIC "-//Norman Walsh//DTD Simplified DocBook XML//EN"
-      "/usr/share/sgml/docbook/custom/simple/4.1.2.4/sdocbook.dtd">
+<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4//EN"
+        "/usr/share/sgml/docbook/dtd/xml/4.2/docbookx.dtd"
+>
 <article lang="fr">
   <articleinfo>
     <title>Opéra</title>