Copyright: Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
See http://www.w3.org/Consortium/Legal/.
Author: Geoff Freed, WGBH/NCAM
           Version:March 13 2001, v2
            Module: Content Control Module
           Feature: systemOverdubOrSubtitle test attribute
         File Name: systemOverdubOrSubtitle.smil
  Media Components: 2 JPG, 2 WAV
 Expected Behavior: Show image;
                    play German audio or show German subtitles, 
                      as selected by the user.  
                    play English audio only if English was selected by
the user.
<smil xmlns="http://www.w3.org/2001/SMIL20/Language">
      <img src="../images/duborsub.jpg"/>
        <audio src="../sounds/germandub.wav"
systemOverdubOrSubtitle="overdub" systemLanguage="de"/>
        <img src="../images/germansub.jpg"
systemOverdubOrSubtitle="subtitle" systemLanguage="de"/>
       <audio src="../sounds/english.wav" systemLanguage="en"/>