    <!--
                Copyright: Copyright 1998-2001 W3C (MIT, INRIA, Keio), All Rights Reserved.
    See http://www.w3.org/Consortium/Legal/.
    Author: Rob Lanphier
                 Edited: Josh Wright (3-15-01)
                Version: $Id:$
                 Module: Media Object
                Feature: param element
              File Name: param.smil
       Media Components: 1 JPEG
      Expected Behavior: One image for 120 seconds.
                         The chromaKey and chromaKeyTolerance
                           parameters are implementation specific extensions.
                         The teal background of smile.jpg should be replaced by
                           the red background specified on the region element.
    -->
    <smil xmlns="http://www.w3.org/2001/SMIL20/Language">
        <head>
           <layout type="text/smil-basic-layout">
             <region id="r1" top="0px" left="0px" height="400" width="400" backgroundColor="red"/>
           </layout>
        </head>
        <body>
            <par>
                 <img src="../images/smile.jpg" dur="7s" region="r1">
                     <param name="chromaKey"          value="#7FFFFE"/>
                     <param name="chromaKeyTolerance" value="#101010"/>
                 </img>
            </par>
        </body>
    </smil>