samples/extensions/xsl/data.xsl

<?xml version="1.0" encoding="utf-8"?>

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<!-- ========================================================================= -->
<!-- Courtesy of Max Froumentin. This document is referenced by data.xml       -->
<!--                                                                           -->
<!-- @author vincent.hardy@eng.sun.com                                         -->
<!-- @version $Id$                                                             -->
<!-- ========================================================================= -->
<?xml-stylesheet href="" type="text/xsl"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns="http://www.w3.org/2000/svg"
                xmlns:xlink="http://www.w3.org/1999/xlink" 
                version="1.0">

  <xsl:template match="/">
    <svg viewBox="-40 -40 80 80" width="1024" height="768" preserveAspectRatio="xMidYMid slice">
      <defs>
        <linearGradient id="gradient" gradientUnits="userSpaceOnUse"
          x1="-100" y1="-100" x2="100" y2="100">
          <stop offset="0" stop-color="crimson"/>
          <stop offset="0.8" stop-color="gold"/>
          <stop offset="1" stop-color="yellow" />
        </linearGradient>

        <linearGradient id="strokeGradient" gradientUnits="userSpaceOnUse"
          x1="100" y1="100" x2="-100" y2="-100">
          <stop offset=".2" stop-color="gold"/>
          <stop offset="1"  stop-color="rgb(128,0,0)" />
        </linearGradient>
      </defs>

      <g id="spiral">
        <xsl:call-template name="draw-primitive">
          <xsl:with-param name="depth" select="data[position()=1]/@depth"/>
        </xsl:call-template>
      </g>
    </svg>
  </xsl:template>

  <xsl:template name="draw-primitive">
    <xsl:param name="depth" select="0"/>
    <xsl:if test="$depth > 0">
      <g transform="scale(.8, .8) rotate(10)">
        <rect x="-100" y="-100" width="200" height="200" fill="url(#gradient)" stroke="none" stroke-width="5"/>
        <xsl:call-template name="draw-primitive">
          <xsl:with-param name="depth" select="$depth - 1"/>
        </xsl:call-template>            
      </g>
    </xsl:if>
  </xsl:template>
</xsl:stylesheet>