Comment 1 for bug 509891

We could also store the gradient coordinates directly in the defs:

  <defs
     id="defs4">
    <linearGradient
       inkscape:collect="always"
       id="linearGradient3701"
       x1="0%"
       y1="0%"
       x2="100%"
       y2="100%"
       gradientUnits="objectBoundingBox">
      <stop
         style="stop-color:#000000;stop-opacity:1;"
         offset="0"
         id="stop3703" />
      <stop
         style="stop-color:#000000;stop-opacity:0;"
         offset="1"
         id="stop3705" />
    </linearGradient>
    <linearGradient
       inkscape:collect="always"
       xlink:href="#linearGradient3701"
       id="linearGradient3707"/>
  </defs>