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Test for WK104189: This test passes if there is a green square with sharp (not blurry) edges.<br/>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 10 10" width="400" height="400">
  <image x="0" y="0" width="100%" height="100%" xlink:href="data:image/svg+xml,
    <svg xmlns='http://www.w3.org/2000/svg'>
      <rect x='10%' y='10%' width='80%' height='80%' fill='green' />
    </svg>
  " />
</svg>
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