Adding New Element using XSLT
 

Hi All,
I have a set of elements to be added to an existing XML document. I would like to write a XSLT tranformation for this. My requirement is that I need to check whether the element is already there in the XML file. Only if its non existent, I need to add that element. I have to repeat this step for a set of elements. Also, my XML file is namespace based.

Please advise.

Regards
Ramesh

Re: Adding New Element using XSLT
 

Here is a simple example of adding an element. Suppose you have the folllowing XML document

<root>

   <list>

      <a>aaaa</a>

      <b>bbbb</b>

   </list>

</root>

and you want to add an extra element <c>. The following stylesheet is one way of adding this element.

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0" >

  <xsl:param name="ename">c</xsl:param>

  <xsl:param name="evalue">cccc</xsl:param>



  <xsl:output method="xml" encoding="utf-8"/>



  <xsl:template match="@*|node()">

     <xsl:copy>

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

     </xsl:copy>

  </xsl:template>



  <xsl:template match="list">

     <xsl:copy>

         <xsl:apply-templates/>

          <xsl:if test="not(c)">

             <xsl:element name="{$ename}"><xsl:value-of select="$evalue"/></xsl:element>

          </xsl:if>

     </xsl:copy>

  </xsl:template>



</xsl:stylesheet>

The output is

<root>

      <list>

      <a>aaaa</a>

      <b>bbbb</b>

   <c>cccc</c></list>

</root>

Re: Adding New Element using XSLT
 

Thanks for the help. I was trying the same thing with my examples. But it looks like only the identity transformation template is only invoked. The other template is not invoked. There is a namespace associated with the XML file. ( The schema that defines the XML has the targetnamespace). Is this why the other templates are not invoked? How to handle namespace based insertion.

Thanks

Re: Adding New Element using XSLT
 

Yes, you have to specifically handle the extra namespace issues.