Match and Add elements with dynamic namespace using xslt - xslt

Question

I have some xml as follows...
<ns1:service1 xmlns:ns1="http://foo.com/service_1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ns1:SystemInfo>
<ns1:functionMode>Y</ns1:functionMode>
</ns1:SystemInfo>
</ns1:service>
Now I need to take it and do 2 things
Wrap in a SOAP envelope
insert a trans tag in SystemInfo
the following works for wrapping...
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:param name = "transId" />
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="*">
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<xsl:copy-of select="/*"/>
</soapenv:Body>
</soapenv:Envelope>
</xsl:template>
</xsl:stylesheet>
Now I need to add the tag, problem is we do not know what the Namespace is (and it could change per request). So I can't hardcode it. However, it will already be in the root tag.
So after I would want...
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<ns1:service1 xmlns:ns1="http://foo.com/service_1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ns1:SystemInfo>
<ns1:trans />
<ns1:functionMode>Y</ns1:functionMode>
</ns1:SystemInfo>
</ns1:service>
</soapenv:Body>
</soapenv:Envelope>
But this doesn't seem to accomplish it....
<xsl:template match="*[local-name()='SystemInfo']">
<xsl:copy>
<xsl:element name="type"/>
<xsl:call-template name="copy-children"/>
</xsl:copy>
</xsl:template>
<!-- Copy the children of the current node. -->
<xsl:template name="copy-children">
<xsl:copy-of select="./*"/>
</xsl:template>
What should the above be instead?

Answer 1

Instead if using xsl:copy-of which will just copy the current element without allowing you to make any changes, use xsl:apply-templates
<soapenv:Body>
<xsl:apply-templates select="#*|node()"/>
</soapenv:Body>
Then you can write a template to match your SystemInfo element, and add whatever new elements you need. You could even make use of the namespace-uri function to add it with the same namespace.
<xsl:template match="*[local-name()='SystemInfo']">
<xsl:copy>
<xsl:element name="trans" namespace="{namespace-uri()}" />
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
Try this XSLT
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:param name="transId"/>
<xsl:template match="#*|node()">
<xsl:copy>
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="/">
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header/>
<soapenv:Body>
<xsl:apply-templates select="#*|node()"/>
</soapenv:Body>
</soapenv:Envelope>
</xsl:template>
<xsl:template match="*[local-name()='SystemInfo']">
<xsl:copy>
<xsl:element name="trans" namespace="{namespace-uri()}" />
<xsl:apply-templates select="#*|node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>