1 <?xml version="1.0" standalone="no"?> 2 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG April 1999//EN" 3 "http://www.w3.org/Graphics/SVG/svg-19990412.dtd"> 4 <svg width="4in" height="3in"> 5 <defs> 6 <symbol id="Triangle" min-x="0" min-y="0" max-x="100" 7 max-y="100" ref-x="0" ref-y="50"> 8 <path d="M 0 0 L 0 100 L 100 50 z"/> 9 </symbol> 10 </defs> 11 <desc>An double-headed arrow example using markers 12 </desc> 13 <path d="M0 0"> 14 <!-- Place an arrowhead rotated 180 degrees at the 15 beginning of the path --> 16 <marker href="#Triangle" width="200" height="200" 17 style="text-transform: rotate(180)"/> 18 <data d="M 2000 2000"/> 19 20 <!-- Turn off markers in the middle of the path --> 21 <marker href=""/> 22 <data d="L 4000 2000 L 4000 4000"/> 23 24 <!-- Place an arrowhead at the end of the path--> 25 <marker href="#Triangle" width="200" height="200"/> 26 <data d="L 6000 4000"/> 27 </path> 28 </svg> 29