<svg id="svg-root"
  width="100%" height="100%" viewBox="0 0 480 360"
  xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:html="http://www.w3.org/1999/xhtml">
  <g id="testmeta">
    <title>Markers on Sub-Path (Arc).</title>
    <html:link rel="author"
          title="Tavmjong Bah"
          href="http://tavmjong.free.fr"/>
  </g>

  <defs>
    <marker id="Start"
            viewBox="0 0 10 10" refX="0" refY="5"
            markerUnits="strokeWidth"
            markerWidth="12"
            markerHeight="9"
            orient="auto"
            fill="green">
      <path d="M 0 0 L 10 5 L 0 10 z"/>
    </marker>
    <marker id="Mid"
            viewBox="0 0 10 10" refX="0" refY="5"
            markerUnits="strokeWidth"
            markerWidth="12"
            markerHeight="9"
            orient="auto"
            fill="orange">
      <path d="M 0 0 L 10 5 L 0 10 z"/>
    </marker>
    <marker id="End"
            viewBox="0 0 10 10" refX="0" refY="5"
            markerUnits="strokeWidth"
            markerWidth="12"
            markerHeight="9"
            orient="auto"
            fill="blue">
      <path d="M 0 0 L 10 5 L 0 10 z"/>
    </marker>
  </defs>

  <g id="test-body-reference" style="fill:none;stroke:black;stroke-width:2">
    <path d="m  50,120  a 30,20 90 0 0 50,0     m  50,0    a 30,20 90 0 0 50,0"/>

    <path d="m  50,240  a 30,20 90 0 1 50,0     m  50,0    a 30,20 90 0 1 50,0"/>

    <path d="M 290,120  A 30,20 90 0 0 340,120  M 390,120  A 30,20 90 0 0 440,120"/>

    <path d="M 290,240  A 30,20 90 0 1 340,240  M 390,240  A 30,20 90 0 1 440,240"/>

    <g id="down">
      <path d="m  50,120 0, 20"   style="stroke:none;marker-start:url(#Start)"/>
      <path d="m 100,120 0,-20"   style="stroke:none;marker-start:url(#Mid)"/>
      <path d="m 150,120 0, 20"   style="stroke:none;marker-start:url(#Mid)"/>
      <path d="m 200,120 0,-20"   style="stroke:none;marker-start:url(#End)"/>
    </g>
    <use xlink:href="#down"  transform="translate(240,  0)"/>

    <g id="up">
      <path d="m  50,240 0,-20"   style="stroke:none;marker-start:url(#Start)"/>
      <path d="m 100,240 0, 20"   style="stroke:none;marker-start:url(#Mid)"/>
      <path d="m 150,240 0,-20"   style="stroke:none;marker-start:url(#Mid)"/>
      <path d="m 200,240 0, 20"   style="stroke:none;marker-start:url(#End)"/>
    </g>
    <use xlink:href="#up"  transform="translate(240,  0)"/>

  </g>

</svg>