Grouping with group-ending-with

      <xsl:stylesheet
                  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                  version="2.0">
            <xsl:output  method="xml"
                        indent="yes"
                        omit-xml-declaration="yes"/>

            <xsl:template  match="/aaa">
                  <xsl:for-each-group  select="*"
                              group-ending-with="bbb">
                        <xsl:apply-templates  select="."/>
                        <group-members>
                              <xsl:apply-templates  select="current-group()"/>
                        </group-members>
                  </xsl:for-each-group>
            </xsl:template>

            <xsl:template  match="*">
                  <xsl:copy-of  select="."/>
            </xsl:template>

      </xsl:stylesheet>

      <aaa>
            <bbb  v="1"/>
            <ccc  v="2"/>
            <bbb  v="3"/>
            <eee  v="4"/>
            <fff  v="5"/>
            <bbb  v="6"/>
            <fff  v="7"/>
      </aaa>

      <bbb  v="1"/>
      <group-members>
            <bbb  v="1"/>
      </group-members>
      <ccc  v="2"/>
      <group-members>
            <ccc  v="2"/>
            <bbb  v="3"/>
      </group-members>
      <eee  v="4"/>
      <group-members>
            <eee  v="4"/>
            <fff  v="5"/>
            <bbb  v="6"/>
      </group-members>
      <fff  v="7"/>
      <group-members>
            <fff  v="7"/>
      </group-members>