<?xml version="1.0" ?>
<svg
xmlns = "http://www.w3.org/2000/svg"
version = "1.1"
width = "500"
height = "500"
>
<line
x1 = "15"
y1 = "15"
x2 = "485"
y2 = "485"
stroke = "#f73"
stroke-width = "5"
/>
</svg>
<marker> which allows to define an arrowhead for a line.