Query Result: A list of all the title-author pairs

<?xml version="1.0" encoding="UTF-8"?>
<results>
   <result>
      <title>TCP/IP Illustrated</title>
      <author>
         <last>Stevens</last>
         <first>W.</first>
      </author>
   </result>
   <result>
      <title>Advanced Programming in the Unix Environment</title>
      <author>
         <last>Stevens</last>
         <first>W.</first>
      </author>
   </result>
   <result>
      <title>Data on the Web</title>
      <author>
         <last>Abiteboul</last>
         <first>Serge</first>
      </author>
   </result>
   <result>
      <title>Data on the Web</title>
      <author>
         <last>Buneman</last>
         <first>Peter</first>
      </author>
   </result>
   <result>
      <title>Data on the Web</title>
      <author>
         <last>Suciu</last>
         <first>Dan</first>
      </author>
   </result>
</results>

Adapted from XML Query Use Cases