Output to multiple documents

      <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:param  name="outdir">/path/to/outdir</xsl:param>

            <xsl:template  match="/aaa">
                  <xsl:apply-templates  select="*"/>
            </xsl:template>

            <xsl:template  match="*">
                  <xsl:result-document  href="{$outdir}/{name()}.xml">
                        <xsl:copy-of  select="."/>
                  </xsl:result-document>
            </xsl:template>

      </xsl:stylesheet>

      <aaa>
            <bbb/>
            <ccc/>
      </aaa>

      <bbb/>

      <ccc/>