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- <?xml version="1.0" standalone="yes"?>
- <smil>
- <body>
- <!-- The SMIL <switch> element will process the
- first child element which tests true and skip
- past all others. -->
- <switch>
- <!-- The system-required attribute tests to see if
- the user agent supports SVG. If true, then
- render the file drawing.svg. -->
- <ref system-required="http://www.w3.org/Graphics/SVG/svg-19990412.dtd" type="image/svg" src="drawing.svg"/>
- <!-- Else, render the alternate image. -->
- <img src="alternate_image.jpg"/>
- </switch>
- </body>
- </smil>
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