<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="filter">
    <feGaussianBlur stdDeviation="1" />
</filter>
</defs>
<text style="font-size:20px;filter:url(#filter);" x="30" y="30">This is for filter <tspan filter="url(#filter)">on filter</tspan>.</text>
</svg>