    <!--
                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. 11, 2000, v1
                Module: SMIL Timing & Sync Module
             Attribute: begin attribute
               Feature: begin attribute and Negative Delay
             File Name: Negative_Delay7.smil
      Media Components: 1 MPG (dur = 5.6s), 1JPG
     Expected Behavior: foo is shown for 10s.
                        When/if foo is clicked
                        then the video starts to play
                        but its three first seconds are skipped
                        (we only see vid during 2.6s).
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <body>
        <par>
          <img id="foo" src="../images/smile.jpg" dur="10s" />
          <video id="vid" src="../videos/nist.rm" begin="foo.activateEvent - 3s"
                 fill="remove"/>
        </par>
      </body>
    </smil>