--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
+"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
+
+<!ELEMENT xi:include (xi:fallback?) >
+<!ATTLIST xi:include
+ xmlns:xi CDATA #FIXED "http://www.w3.org/2001/XInclude"
+ href CDATA #REQUIRED
+ parse (xml|text) "xml"
+ encoding CDATA #IMPLIED >
+
+<!ELEMENT xi:fallback ANY>
+<!ATTLIST xi:fallback
+ xmlns:xi CDATA #FIXED "http://www.w3.org/2001/XInclude" >
+
+<!ENTITY % local.chapter.class "| xi:include">
+]>
+<book id="book">
+ <bookinfo>
+ <title>Unit Test: book.001</title>
+ <releaseinfo role="CVS">$Id$</releaseinfo>
+ <corpauthor>DocBook Project Development Team</corpauthor>
+ </bookinfo>
+ <xi:include href="bibliography.001.xml"/>
+ <xi:include href="bibliography.002.xml"/>
+ <xi:include href="bibliography.003.xml"/>
+ <xi:include href="bibliography.004.xml"/>
+</book>