-<?xml version='1.0' ?> <!-- Mode: Docbook -->
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
+<!ENTITY % myents SYSTEM "entities.inc">
+%myents;
+]>
<preface id="preface">
<title>Preface</title>