<xsl:stylesheet version="1.0" 

	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

	xmlns:marc="http://www.loc.gov/MARC21/slim"

>

  <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>

  <xsl:template match="/">

	  <xsl:apply-templates/>

  </xsl:template>

  <xsl:template match="marc:record">

    <marc:record>

	  <xsl:apply-templates/>

      <marc:datafield tag="901" ind1='' ind2=''>

        <marc:subfield code="a">

          <xsl:text>Hi, I am 901</xsl:text>

        </marc:subfield>

      </marc:datafield>

    </marc:record>

  </xsl:template>

  <xsl:template match="node()">

    <xsl:copy select=".">

      <xsl:copy-of select="@*"/>

      <xsl:apply-templates/>

    </xsl:copy>

  </xsl:template>

</xsl:stylesheet>