Creating sequences using "to" operator

      <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="1 to 5"/>
                  </xxx>
                  <yyy>
                        <xsl:value-of  select="-3 to 3"/>
                  </yyy>
                  <zzz>
                        <xsl:value-of  select="3 to 3"/>
                  </zzz>
                  <rrr>
                        <xsl:value-of  select="5 to 2"/>
                  </rrr>
            </xsl:template>

      </xsl:stylesheet>

      <aaa/>

      <xxx>1 2 3 4 5</xxx>
      <yyy>-3 -2 -1 0 1 2 3</yyy>
      <zzz>3</zzz>
      <rrr/>