Sorting of sequences

      <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="/">
                  <sss>
                        <xsl:perform-sort  select="12,1,4,2,3,6">
                              <xsl:sort/>
                        </xsl:perform-sort>
                  </sss>
            </xsl:template>

      </xsl:stylesheet>

      <aaa/>

      <sss>1 2 3 4 6 12</sss>