<svg xmlns="http://www.w3.org/2000/svg" width="300" height="200">
 <desc>There should be a green circle when this is rendered.</desc>
 <x:test xmlns:x="http://www.example.org/" xml:id="test">
  <linearGradient x1="0" y1="0" x2="1" y2="0"
                 gradientUnits="objectBoundingBox">   
   <stop offset="0" stop-color="maroon"/>
   <stop offset="1" stop-color="red"/>
  </linearGradient>
 </x:test>
 <circle cx="150" cy="100" r="50" fill="red"/>
 <!-- on the next line the given paint server is not valid, therefore it is unsupported and XXX raised as last call issue XXX -->
 <rect x="0" y="0" width="300" height="200" stroke="blue" fill="url(#test)"/>
 <text x="10" y="30" font-size="20" fill="blue">There should be a black</text>
 <text x="10" y="60" font-size="20" fill="blue">rectangle with a blue</text>
 <text x="10" y="90" font-size="20" fill="blue">border on this page.</text>
</svg>