<!DOCTYPE html>
<meta charset="utf-8">
<title>href - filter element</title>
<meta name="assert" content="The filter element should accept href">
<link rel="match" href="href-filter-element-ref.html">
<body>
  <svg width="300" height="300" viewBox="0 0 300 300"
       xmlns:xlink="http://www.w3.org/1999/xlink">
    <filter id="blurMe">
      <feGaussianBlur in="SourceGraphic" stdDeviation="5" />
    </filter>
    <filter id="dropShadow">
      <feGaussianBlur in="SourceAlpha" stdDeviation="3" />
      <feOffset dx="2" dy="4" />
      <feMerge>
        <feMergeNode />
        <feMergeNode in="SourceGraphic" />
      </feMerge>
    </filter>
    <filter id="Copied" href="#blurMe" xlink:href="#dropShadow">
    </filter>
    <circle cx="60" cy="60" r="50" fill="green" filter="url(#Copied)"/>
  </svg>
</body>