A typical, simple SVG example

example.svg

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg width="5cm" height="4cm" version="1.1" xmlns="http://www.w3.org/2000/svg">
    <desc>Examples of geometry</desc>

    <!-- A border around our objects -->
    <rect x=".01cm" y=".01cm" width="4.98cm" height="3.98cm" fill="none" stroke="#0000ff" stroke-width=".02cm" />

    <!-- Four rectangles -->
    <rect x="0.5cm" y="0.5cm" width="2cm" height="1cm"/>
    <rect x="0.5cm" y="2cm" width="1cm" height="1.5cm"/>
    <rect x="3cm" y="0.5cm" width="1.5cm" height="2cm"/>
    <rect x="3.5cm" y="3cm" width="1cm" height="0.5cm"/>

    <!-- A circle -->
    <circle cx="2.5cm" cy="2.5cm" r="1cm" fill="#ff0000"/>

    <!-- Two lines -->
    <line x1="1cm" y1="1cm" x2="3cm" y2="3cm" stroke-width="5" stroke="#00ff00"/>
    <line x1="2cm" y1="2cm" x2="3cm" y2="1cm" stroke-width="10" stroke="#ffff00"/>

</svg>