<?xml version="1.0" encoding="iso-8859-1"?>
-<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1//EN"
+"http://www.oasis-open.org/docbook/xml/4.1/docbookx.dtd" [
<!ENTITY % myents SYSTEM "entities.inc">
%myents;
]>