Intersection of nodes

      <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">
                  <xxx>
                        <xsl:value-of  select="bbb intersect ccc"/>
                  </xxx>
                  <yyy>
                        <xsl:value-of  select="bbb intersect *"/>
                  </yyy>
                  <zzz>
                        <xsl:value-of  select="*[position()>1] intersect *[position() &lt; last()]"/>
                  </zzz>
            </xsl:template>

      </xsl:stylesheet>

      <aaa>
            <bbb>B1</bbb>
            <bbb>B2</bbb>
            <ccc>C1</ccc>
            <ccc>C2</ccc>
      </aaa>

      <xxx/>
      <yyy>B1 B2</yyy>
      <zzz>B2 C1</zzz>