Root("/BookDB/Book")/book

  <book year = '1994'>
    <!--this is the 1st book-->
    <title>
      TCP/IP Illustrated
    </title>
    <author>
      <last>
        Stevens
      </last>
      <first>
        W.
      </first>
    </author>
    <publisher>
      Addison-Wesley
    </publisher>
    <price>
      65.95
    </price>
  </book>
  <book year = '1992'>
    <!--this is another book-->
    <title>
      Advanced Programming in the Unix environment
    </title>
    <author>
      <last>
        Stevens
      </last>
      <first>
        W.
      </first>
    </author>
    <publisher>
      Addison-Wesley
    </publisher>
    <price>
      65.95
    </price>
  </book>
  <book year = '1999'>
    <!--this is another book-->
    <title>
      The Economics of Technology and Content for Digital TV
    </title>
    <editor>
      <last>
        Gerbarg
      </last>
      <first>
        Darcy
      </first>
      <affiliation>
        CITI
      </affiliation>
    </editor>
    <publisher>
      Kluwer Academic Publishers
    </publisher>
    <price>
      129.95
    </price>
  </book>
  <book year = '2000'>
    <!--this is another book-->
    <title>
      Data on the Web
    </title>
    <author>
      <last>
        Abiteboul
      </last>
      <first>
        Serge
      </first>
    </author>
    <author>
      <last>
        Buneman
      </last>
      <first>
        Peter
      </first>
    </author>
    <author>
      <last>
        Suciu
      </last>
      <first>
        Dan
      </first>
    </author>
    <publisher>
      Morgan Kaufmann Publishers
    </publisher>
    <price>
      39.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Data on the Web
    </title>
    <price>
      34.95
    </price>
    <review>
      A very good discussion of semi-structured database
		systems and XML.
    </review>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Advanced Programming in the Unix environment
    </title>
    <price>
      65.95
    </price>
    <review>
      A clear and detailed discussion of UNIX programming.
    </review>
  </book>
  <book>
    <!--this is another book-->
    <title>
      TCP/IP Illustrated
    </title>
    <price>
      65.95
    </price>
    <review>
      One of the best books on TCP/IP.
    </review>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Advanced Programming in the Unix environment
    </title>
    <source>
      www.amazon.com
    </source>
    <price>
      65.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Advanced Programming in the Unix environment
    </title>
    <source>
      www.bn.com
    </source>
    <price>
      65.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      TCP/IP Illustrated
    </title>
    <source>
      www.amazon.com
    </source>
    <price>
      65.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      TCP/IP Illustrated
    </title>
    <source>
      www.bn.com
    </source>
    <price>
      65.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Data on the Web
    </title>
    <source>
      www.amazon.com
    </source>
    <price>
      34.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Data on the Web
    </title>
    <source>
      www.bn.com
    </source>
    <price>
      39.95
    </price>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Data on the Web
    </title>
    <author>
      Serge Abiteboul
    </author>
    <author>
      Peter Buneman
    </author>
    <author>
      Dan Suciu
    </author>
    <section id = 'intro' difficulty = 'easy'>
      <title>
        Introduction
      </title>
      <p>
        Text ...
      </p>
      <section>
        <title>
          Audience
        </title>
        <p>
          Text ...
        </p>
      </section>
      <section>
        <title>
          Web Data and the Two Cultures
        </title>
        <p>
          Text ...
        </p>
        <figure height = '400' width = '400'>
          <title>
            Traditional client/server architecture
          </title>
          <image source = 'csarch.gif'>
          </image>
        </figure>
        <p>
          Text ...
        </p>
      </section>
    </section>
  </book>
  <book>
    <!--this is another book-->
    <title>
      Data on the Web
    </title>
    <author>
      Serge Abiteboul
    </author>
    <author>
      Peter Buneman
    </author>
    <author>
      Dan Suciu
    </author>
    <section id = 'syntax' difficulty = 'medium'>
      <title>
        A Syntax For Data
      </title>
      <p>
        Text ...
      </p>
      <figure height = '200' width = '500'>
        <title>
          Graph representations of structures
        </title>
        <image source = 'graphs.gif'>
        </image>
      </figure>
      <p>
        Text ...
      </p>
      <section>
        <title>
          Base Types
        </title>
        <p>
          Text ...
        </p>
      </section>
      <section>
        <title>
          Representing Relational Databases
        </title>
        <p>
          Text ...
        </p>
        <figure height = '250' width = '400'>
          <title>
            Examples of Relations
          </title>
          <image source = 'relations.gif'>
          </image>
        </figure>
      </section>
      <section>
        <title>
          Representing Object Databases
        </title>
        <p>
          Text ...
        </p>
      </section>
    </section>
  </book>