SVG with PNG fallback -- from Alexey Ten and CSS Tricks

gistfile1.txt

<svg width="96" height="96">
  <image xlink:href="svg.svg" src="svg.png" width="96" height="96" />
</svg>

<!--

  by Alexey Ten
  http://lynn.ru/examples/svg/en.html
  
  Exploits the way browsers render the image tag. Widely supported, including all major browsers.
  IE 8, which doesn't support SVG, it displays the fallback PNG. Android 2.3, same story.
  More details, including performance and some issues in older mobile OS's here:
  
  http://css-tricks.com/svg-fallbacks/ 

-->