    <!--
                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: lower=defer value
             File Name: lower_defer.smil
      Media Components: 1 JPG, 1MPG (5.6s), 1MPG
     Expected Behavior: the first video is played then the second one is played
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <body>
         <excl>
          <priorityClass lower="defer">
            <video id="vid1" src="../videos/pe_video1.rm" begin="0s" />
          </priorityClass>
          <priorityClass >
            <video src="../videos/nist.rm" id="vid2" begin="3s"/>
          </priorityClass>
         </excl>
      </body>
    </smil>