[xsl] Why doesn't this simple XSLT (Identity transform) work?

Hi,

It's been awhile since I've worked with XSLT, but I'm having to implement one 
that removes an element (<Signature>) from the incoming (SOAP) message.  I know 
that this should be simple, and I know that I have written similar XSLT before, 
but for some reason, I can get this to work.

Here's an example SOAP message:

<SOAP:Envelope xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion" 
xmlns:samlp="urn:oasis:names:tc:SAML:1.0:protocol" 
xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
 xmlns:env="http://schemas.xmlsoap.org/soap/envelope/";>
    <SOAP:Header>
        <wsse:Security SOAP:mustUnderstand="1">
            <saml:Assertion MajorVersion="1" MinorVersion="1" 
AssertionID="ID46a342be-9d3a-437a-8a26-85fcd72a723d" Issuer="http://foo.com"; 
IssueInstant="2009-12-01T21:55:13Z">
                <saml:Conditions NotBefore="2009-12-01T21:54:58Z" 
NotOnOrAfter="2009-12-01T22:10:28Z"/>
                <saml:AuthenticationStatement 
AuthenticationMethod="urn:oasis:names:tc:SAML:1.0:am:unspecified" 
AuthenticationInstant="2009-12-01T21:55:13Z">
                .....
                </saml:AuthenticationStatement>
             <Signature xmlns="http://www.w3.org/2000/09/xmldsig#";>
                  ...                    
             </Signature></saml:Assertion></wsse:Security>
</SOAP:Header>
<env:Body>
        <m:hello xmlns:m="http://services";>
            <m:x>123</m:x></m:hello>
</env:Body>
</SOAP:Envelope>


It's a SOAP message with a SAML assertion...

And, here's the XSLT that I'm using:

<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/";  
xmlns:dp="http://www.datapower.com/extensions"; 
    xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/";
    xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion" 
    xmlns:samlp="urn:oasis:names:tc:SAML:1.0:protocol" 
    
xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
>
    <xsl:output method="xml"/>
    
    
    
    
    <xsl:template match="node()|@*">
        <xsl:copy>
            <xsl:apply-templates select="node()|@*"/>
        </xsl:copy>
    </xsl:template>
    
    <xsl:template match="//Signature">
    </xsl:template>
    
</xsl:stylesheet>

What the XSLT seems to be doing is just doing the Identity transform, and 
copying everything from the input message to the output, i.e., the 
"<xsl:template match="//Signature">" is not getting processed at all.

I've tried different things for that template match, including just 
"Signature", a "fully-qualified" match term, etc.  

I have the impression that the XSLT processing should always use the more 
specific match (i.e., the one above, and not the Identity transform), but it 
doesn't seem to be working :(...

I've tried running this under an XSLT debugger (in oXygen), and I can see that 
it never gets to that template match.

I'm sure that I am missing something really obvious here, but I've been staring 
at  this for awhile, and can't see it, so I hope that someone can help :(!!

Thanks in advance!!

Jim

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