In any case, a reduced version of the input WSDL is below. I want the output to be exactly the same except for the changes to the root tag:

    <definitions
        targetNamespace="http://my.new.namespace/"
        xmlns:tns="http://my.new.namespace/"

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="1.0"
  xmlns:tns="http://my.new.namespace/"
  xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
  xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
  xmlns:ro="urn:Databox"
  xmlns:n1="http://schemas.xmlsoap.org/wsdl/"
  xmlns="http://schemas.xmlsoap.org/wsdl/">

  <xsl:template match="*">
    <xsl:element name="{name()}" namespace="{namespace-uri()}">
      <xsl:apply-templates select="@* | node()"/>
    </xsl:element>
  </xsl:template>

  <xsl:template match="/wsdl:definitions">
    <xsl:element name="{name()}" namespace="{namespace-uri()}">
      <xsl:copy-of select="document('')/*/namespace::*"/>
      <xsl:apply-templates select="@* | node()"/>
    </xsl:element>
  </xsl:template>

  <xsl:template match="@* | comment() | processing-instruction()">
    <xsl:copy-of select="."/>
  </xsl:template>

	Martin Honnen
	http://JavaScript.FAQTs.com/