master.xml

<?xml version="1.0" encoding="utf-8" ?>
<data>
  <vcard>
    <entry id="98">
      <forename handle="forrest">Forrest</forename>
      <surname handle="gump">Gump</surname>
      <work-phone>(111) 555-1212</work-phone>
      <primary-email>forrestgump@example.com</primary-email>
      <title handle="shrimp-man">Shrimp Man</title>
    </entry>
  </vcard>
</data>

master.xsl

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
  
<xsl:output method="text" media-type="text/vcard" encoding="utf-8"/>

<xsl:template match="/data/vcard/entry">
BEGIN:VCARD
VERSION:3.0
N:<xsl:value-of select="forename"/>;<xsl:value-of select="surname"/>
FN:<xsl:value-of select="surname"/> <xsl:value-of select="forename"/>
TITLE:<xsl:value-of select="title"/>
TEL;TYPE=WORK,VOICE:<xsl:value-of select="work-phone"/>
EMAIL;TYPE=PREF,INTERNET:<xsl:value-of select="primary-email"/>
REV:2008-04-24T19:52:43Z
END:VCARD
</xsl:template>

</xsl:stylesheet>