    <!--
                Copyright: Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
    See http://www.w3.org/Consortium/Legal/.
    Author: Muriel Jourdan (Muriel.Jourdan@inrialpes.fr)
               Version: Oct 10th, 2000, v1
                Module: SMIL Timing & Sync Module
               Feature: begin=id.begin with id that is defered
             File Name: begin_begin_syncbaseexcl2.smil
      Media Components: 2 JPG, 1MPG(5.6s)
     Expected Behavior: the video is played for 4s,
                          then the smile image is shown for 4s,
                          then a blank of 3s,
                          then the smile image is shown for 5s
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <body>
         <excl>
            <priorityClass peers="defer">
                <video src="../videos/nist.rm" begin="0s" dur="4s" id="video"/>
                <img src="../images/smile.jpg"  begin="2s" id="smile" dur="4s"/>
                <img src="../images/frown.jpg" id="frown" begin="smile.begin+7s"
                     dur="5s" />
            </priorityClass>
         </excl>
      </body>
    </smil>