book.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<book>
  <!-- This is a sample book.xml file. See the O'Reilly DocBook Authoring Guidelines at https://prod.oreilly.com/external/tools/docbook/docs/authoring/ for information on working with DocBook XML. -->

  <!-- Reference new files using XIncludes (not entities): http://www.sagehill.net/docbookxsl/ModularDoc.html#UsingXinclude -->

  <!-- Each file should have a DOCTYPE at the top of it so you can validate it alone (just like this but with a chapter/preface instead of book-->

  <!-- Remember, using XIncludes means that you'll have to add a flag (typically 'xinclude' with one or two dashes) when using XML processors/parsers -->

  <!-- Validate with xmllint as follows (Basic setup same as libxslt: http://www.sagehill.net/docbookxsl/InstallingAProcessor.html)-->

  <!-- (please collapse dashes in the line beloew) -->

  <!-- $ xmllint - -xinclude - -noout - -postvalid book.xml -->

  <title>Book Title Goes Here</title>

  <bookinfo>
    <edition>1</edition>

    <isbn><!--ISBN goes here--></isbn>
  </bookinfo>

  <xi:include href="ch00.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />

  <xi:include href="ch01.xml" xmlns:xi="http://www.w3.org/2001/XInclude" />
</book>