An example...

<?xml version="1.0"?>
<svg width="6in" height="4.5in" viewBox="0 0 600 450" xmlns="http://www.w3.org/2000/SVG">
<g transform="translate(10 10)">
<title>Hub</title>
<desc>A typical 10BaseT/100BaseTX network hub</desc>
<rect width="253" height="84"/>
<rect width="230" height="44" x="12" y="10"/>
<circle cx="227" cy="71" r="7"/>
</g></svg>