<book>
   <title>XML today</title>
   <chapter>
     <title>XML</title>
     <para> The first chapter discusses XML. </para>
   </chapter>
   <chapter>
     <title>XSLT</title>
     <para> Chapter two is about XSLT. </para>
   </chapter>
   <chapter>
     <title>CSS 2</title>
     <para> This chapter explains CSS 2. </para>
   </chapter>
 </book>