    <!--
                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: APr. 3, 2000, v1
                Module: SMIL Timing & Sync Module
               Feature: begin attribute and Negative Delay
             File Name: Negative_Delay1.smil
      Media Components: 1 MPG (dur = 5.6s)
     Expected Behavior: The video start to play at t=2s
                          but from its middle point instead of its begining.
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <body>
        <par begin="2s"id="p1">
          <video id="vid" src="../videos/nist.mpg" begin="p1.begin-2.8s" />
        </par>
      </body>
    </smil>