1<?xml version="1.0" standalone="yes"?> 2<smil> 3 <body> 4 <!-- The SMIL <switch> element will process the 5 first child element which tests true and skip 6 past all others. --> 7 <switch> 8 9 <!-- The system-required attribute tests to see if 10 the user agent supports SVG. If true, then 11 render the file drawing.svg. --> 12 <ref system-required="http://www.w3.org/Graphics/SVG/svg-19990412.dtd" 13 type="image/svg" src="drawing.svg" /> 14 15 <!-- Else, render the alternate image. --> 16 <img src="alternate_image.jpg" /> 17 </switch> 18 </body> 19</smil> 20 21 22
