<!-- The SVG file referenced in our <image> tag uses itself as an <image>.
     Currently, we don't paint recursively-referenced images beyond the first
     level.  So, the <image> element inside our helper document doesn't get
     painted, and we end up only showing one blue circle. -->
<svg xmlns="http://www.w3.org/2000/svg"
     xmlns:xlink="http://www.w3.org/1999/xlink"
     width="100" height="100">
  <image width="100" height="100"
         xlink:href="svg-image-recursive-1a.svg"/>
</svg>