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