Craft3e-0.2.0.3: svgOut.xml

<svg width="100%" height="100%" version="1.1"
xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<filter id="negative">
<feColorMatrix type="matrix"
values="-1 0  0  0  0  0 -1  0  0  0  0  0 -1  0  0  1  1  1  0  0" />
</filter>

  <image x="0" y="0" width="150" height="200" xlink:href="blk_horse_head.jpg"/>

  <image x="150" y="0" width="150" height="200" xlink:href="blk_horse_head.jpg" transform="translate(450,0) scale(-1,1)"  filter="url(#negative)"/>

</svg>