1<xsl:stylesheet version="1.8" 2 xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> 3 <xsl:template match="/"> 4 <xsl:choose> 5 <xsl:when test="system-property('xsl:version') >= 1.8"> 6 <xsl:exciting-new-1.8-feature/> 7 </xsl:when> 8 <xsl:otherwise> 9 <html> 10 <head> 11 <title>XSLT 1.8 required</title> 12 </head> 13 <body> 14 <p>Sorry, this stylesheet requires XSLT 1.8.</p> 15 </body> 16 </html> 17 </xsl:otherwise> 18 </xsl:choose> 19 </xsl:template> 20</xsl:stylesheet> 21