<xsl:stylesheet version="1.8"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<xsl:choose>
<xsl:when test="system-property('xsl:version') >= 1.8">
<xsl:exciting-new-1.8-feature/>
</xsl:when>
<xsl:otherwise>
<html>
<head>
<title>XSLT 1.8 required</title>
</head>
<body>
<p>Sorry, this stylesheet requires XSLT 1.8.</p>
</body>
</html>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>