XML/SVG/marker

Using the SVG marker Element

<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
  "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg width="100%" height="100%"
     xmlns="http://www.w3.org/2000/svg">
  <defs>
    <linearGradient id="gradientDefinition"
      x1="0" y1="0" x2="20" y2="0"
      gradientUnits="userSpaceOnUse">
      <stop offset="0%"   stop-color="#FFFF00"/>
      <stop offset="100%" stop-color="#000000"/>
    </linearGradient>
    <marker id="triangularMarker1"
      refX="0" refY="4"
      markerUnits="strokeWidth"
      markerWidth="20" markerHeight="8"
      fill="url(#gradientDefinition)"
      orient="auto">
      <path d="M0,0 l20,4 l-20,4 z"/>
    </marker>
  </defs>
  <path d="M 100,200 L 300,200"
        stroke="red" stroke-width="4"
        marker-end="url(#triangularMarker1)"/>
</svg>