All,

I have the following XML
============
<?xml version = '1.0' encoding = 'UTF-8'?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
         <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
            <SignedInfo>
            <KeyInfo>
            </KeyInfo>
         </Signature>
</soap:Envelope>
=========
I want to convert this to the following with xslt
=========
<?xml version = '1.0' encoding = 'UTF-8'?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
         <dsig:Signature xmlns="http://www.w3.org/2000/09/xmldsig#" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">
            <dsig:SignedInfo>
            <dsig:KeyInfo>
            </dsig:KeyInfo>
         </dsig:Signature>
</soap:Envelope>
=========

The Only difference is "Signature" element now it has got namespace "xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" and all elements both "Signature" and the childs underneath have "dsig" namesapce.

Thank you..

You need a modified version of the identity template:

<xsl:template match="Signature">
  <xsl:apply-templates select="." mode="add-ns"/>
</xsl:template>

<xsl:template match="*" mode="add-ns">
  <xsl:element name="dsig:{local-name()}" namespace="http://www.w3.org/2000/09/xmldsig#">
    <xsl:apply-templates mode="add-ns"/>
  </xsl:element>
</xsl:template>

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

thans for the response, I tried but the output is only getting the values of elemenets... here is the output..

===
<?xml version="1.0" encoding="UTF-16"?>abcd
===
for the xml same as in my original post just added value to "KeyInfo"

Sorry I didn't spot that Signature was already in the right namespace and you only want to change the prefix. So just change

<xsl:template match="Signature">

to

<xsl:template match="s:Signature" xmlns:s="http://www.w3.org/2000/09/xmldsig#">

Though you can't be 100% sure that the processor will choose the prefix that you want - the theory is that prefixes don't matter.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

sorry for not being clear here is what I'm trying to do... There is no namespace reference the original xml looks like

 <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">

I want the output like
 <dsig:Signature xmlns="http://www.w3.org/2000/09/xmldsig#" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">

adding one more namespace leaving the one already there and adding a prefix to the element...

hope it' clear

No, you're not being clear. You say

There is no namespace reference.

And then you show me XML containing a namespace declaration like:

 the original xml looks like
 <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">

Perhaps I don't know what you mean by "namespace reference" - it's not standard terminology.

At this stage I start to wonder why you want to do what you are doing. Perhaps if you're using non-standard terminology, you don't understand namespaces all that well, and you don't really need to change the prefix at all? So I'd like to take a step back and ask why - why do you want the output that you say you want? Because it's a little bit unusual, so you must have some reason.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Yes, you do have a point, of what I'm doing, I'm trying to overcome bug on a security product. They expect the signature element have two namespace declarations. That product is expecting like below

        <dsig:Signature xmlns="http://www.w3.org/2000/09/xmldsig#" xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">
            <dsig:SignedInfo>
            <dsig:KeyInfo>
            </dsig:KeyInfo>
         </dsig:Signature>

thanks