leifj/pyFF

<?xml version="1.0"?>
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  xmlns:date="http://exslt.org/dates-and-times" extension-element-prefixes="date">

  <xsl:param name="publisher"/>
  <xsl:variable name="datetime">
    <xsl:value-of select="date:date-time()"/>
  </xsl:variable>

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      <xsl:apply-templates select="node()|@*"/>
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      <xsl:apply-templates select="node()"/>
      <xsl:element name="mdrpi:PublicationInfo">
        <xsl:attribute name="publisher"><xsl:value-of select="$publisher"/></xsl:attribute>
        <xsl:attribute name="creationInstant"><xsl:value-of select="$datetime"/></xsl:attribute>
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    <xsl:apply-templates select="md:EntityDescriptor"/>
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  <xsl:template match="md:EntitiesDescriptor[not(md:Extensions)]">
    <xsl:copy>
      <xsl:apply-templates select="@*"/>
        <xsl:element name="md:Extensions">
          <xsl:element name="mdrpi:PublicationInfo">
            <xsl:attribute name="publisher"><xsl:value-of select="$publisher"/></xsl:attribute>
            <xsl:attribute name="creationInstant"><xsl:value-of select="$datetime"/></xsl:attribute>
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      <xsl:apply-templates select="md:EntityDescriptor"/>
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</xsl:stylesheet>