    <!--
                Copyright: Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
    See http://www.w3.org/Consortium/Legal/.
    Author: Aaron Cohen, Intel
             File Name: begin-prev-end.smil
      Media Components: 2 JPG
     Expected Behavior: show 1st image
                        pause 1s
                        show 2nd image
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
       <body>
          <par>
             <img id="image1" src="../images/smile.jpg" dur="5s"/>
             <img src="../images/frown.jpg" begin="prev.end+1s" dur="5s"/>
          </par>
       </body>
    </smil>