Sample marked up by dtd

<!DOCTYPE letter SYSTEM "buslet.dtd">
<letter>
    <date>25 June 1998</date>
    <address>
       <line>Mr. Wm. Gates </line>
       <line>The Campus</line>
       <line>Redmond, WA </line>
    </address>
    <salutation><line> Dear Mr. Gates: </line></salutation>
    <body>
        <p>Thank you for your offer to return Unleashing Linux, but we assure you that it was sent only with the thought that it might prove stimulating, and you may keep the copy at no charge. Enjoy!</p>
    </body>
    <close> Sincerely, </close>
    <signature>
        <line>Jesse Moi </line>
        <line>Vice President of Development </line>
        <line>Sams Books: a division of Bertelsman, Gmbh.</line>
    </signature>
</letter>