I have an XML file which has many section like the one below:

<Operations>
  <Action [some attributes ...]>
    [some complex content ...]
  </Action>
  <Action [some attributes ...]>
    [some complex content ...]
  </Action>
</Operations>

I have to add an <Action/> to every <Operations/>. It seems that an XSLT should be a good solution to this problem:

<xsl:template match="Operations/Action[last()]">
  <xsl:copy>
    <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
  <Action>[some complex content ...]</Action>
</xsl:template>

<xsl:template match="@*|node()">
  <xsl:copy>
    <xsl:apply-templates select="@*|node()"/>
  </xsl:copy>
</xsl:template>

My problem is that the content of my <Action/> contains some xPath expressions. For example:

<Action code="p_histo01">
  <customScript languageCode="gel">
    <gel:script
          xmlns:core="jelly:core"
          xmlns:gel="jelly:com.niku.union.gel.GELTagLibrary"
          xmlns:soap="jelly:com.niku.union.gel.SOAPTagLibrary"
          xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/"
          xmlns:sql="jelly:sql"
          xmlns:x="jelly:xml"
          xmlns:xog="http://www.niku.com/xog"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <sql:param value="${gel_stepInstanceId}"/>
    </gel:script>
  </customScript>
</Action>

The ${gel_stepInstanceId} is interpreted by my XSLT but I would like it to be copied as-is. Is that possible? How?