Running first XSLT 2.0 stylesheet with IBM XSLT 2.0 engine

I could run my first XSLT 2.0 stylesheet with IBM XSLT 2.0 engine (ref, WAS XML Feature Pack Open Beta).

I tried the following XSLT 2.0 stylesheet, using xsl:for-each-group instruction, which worked well with the IBM XSLT engine.

<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="2.0">

  <xsl:output method="xml" indent="yes" />

  <xsl:template match="books">
     <books>
       <xsl:for-each-group select="book" group-by="author">
   <author name="{current-grouping-key()}">
      <xsl:for-each select="current-group()">
        <book>
          <xsl:copy-of select="name" />
   <xsl:copy-of select="publisher" />
        </book>
      </xsl:for-each>
   </author>
       </xsl:for-each-group>
     </books>
  </xsl:template>

</xsl:stylesheet>