<?xml version=“1.0” standalone=“no”?> <!DOCTYPE svg PUBLIC “-//W3C//DTD SVG April 1999//EN” “www.w3.org/Graphics/SVG/svg-19990412.dtd”> <svg width=“4in” height=“3in”>

<defs>
  <symbol id="Triangle" min-x="0" min-y="0" max-x="100" max-y="100" ref-x="0" ref-y="50">
    <path d="M 0 0 L 0 100 L 100 50 z"/>
  </symbol>
</defs>
<desc>An double-headed arrow example using markers
</desc>
<path d="M0 0">

<!– Place an arrowhead rotated 180 degrees at the

     beginning of the path -->
<marker href="#Triangle" width="200" height="200" style="text-transform: rotate(180)"/>
<data d="M 2000 2000"/>

<!– Turn off markers in the middle of the path –>

<marker href=""/>
<data d="L 4000 2000 L 4000 4000"/>

<!– Place an arrowhead at the end of the path–>

  <marker href="#Triangle" width="200" height="200"/>
  <data d="L 6000 4000"/>
</path>

</svg>