Copyright: Copyright 1998-2005  W3C (MIT, ERCIM, Keio), All Rights Reserved.
See http://www.w3.org/Consortium/Legal/.
Author: Muriel Jourdan (Muriel.Jourdan@ERCIMlpes.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/2005/SMIL21/Language">
      <priorityClass lower="defer">
        <video id="vid1" src="../videos/pe_video1.mpg" begin="0s" />
      <priorityClass >
        <video src="../videos/nist.mpg" id="vid2" begin="3s"/>