<svg width="100" height="150" viewBox="0 0 100 150"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="turbFilter">
<feTurbulence type=""
baseFrequency="" numOctaves=""
in="SourceGraphic"/>
</filter>
</defs>
<g style="font-family: sans-serif; font-size: 12pt">
<g transform="translate(10,20)">
<rect x="25" y="0" width="50" height="50"
style="filter: url(#turbFilter);"/>
<text x="0" y="70">type="turbulence"</text>
<text x="0" y="85">baseFrequency="0.1"</text>
<text x="0" y="100">numOctaves="1"</text>
</g>
</g>
</svg>