--- XSL

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
	<xsl:output method="xml" omit-xml-declaration="no" indent="yes"/>
	<xsl:strip-space elements="*" />
	<xsl:template match="*|@*">
		<xsl:copy>
			<xsl:apply-templates select="*|@*" />
			<xsl:variable name="current" select="." />
		</xsl:copy>
	</xsl:template>
</xsl:stylesheet>


--- SOURCE

<ap:configuration xmlns="http://namespace.amberpoint.com/amf" xmlns:ap="http://namespace.amberpoint.com/amf" >
  <ap:webService wsdl="http://localhost:9712/WSID/xml/out/supplier.concrete.wsdl.xml" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
  </ap:webService>
</ap:configuration>



--- RESULT (built-in processor)

<?xml version='1.0' ?>
<ap:configuration xmlns:ap="">
  <ap:webService wsdl="http://localhost:9712/WSID/xml/out/supplier.concrete.wsdl.xml"/>
</ap:configuration>


--- RESULT (internal Xalan-J processor)

ex.acf (3, 133)
java.lang.RuntimeException: Attribute "wsdl" bound to namespace "null" was already specified for element "ap:webService".; SystemID: file:///c:/devsw/p4root/ce/main/tools/acf/temp/ex.acf; Line#: 3; Column#: ; SystemID: file:///c:/devsw/p4root/ce/main/tools/acf/temp/ex.acf; Line#: 3; Column#: 133 javax.xml.transform.TransformerException: Attribute "wsdl" bound to namespace "null" was already specified for element "ap:webService". 	at org.apache.xalan.transformer.TransformerImpl.fatalError(TransformerImpl.java:736) 	at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:712) 	at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1119) 	at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1097) 	at com.exln.stylus.CXalanDriver.doProcessing(CXalanDriver.java:104) 	at com.exln.stylus.CProcessorDriver.process(CProcessorDriver.java:52)


--- RESULT (.NET processor)

<?xml version='1.0' encoding='utf-8' ?>
<ap:configuration xmlns:ap="http://namespace.amberpoint.com/amf" xmlns="http://namespace.amberpoint.com/amf">
  <ap:webService wsdl="http://localhost:9712/WSID/xml/out/supplier.concrete.wsdl.xml" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"/>
</ap:configuration>

--- RESULT (Saxon processor)

<?xml version='1.0' ?>
<ap:configuration xmlns:ap="http://namespace.amberpoint.com/amf" xmlns:="http://namespace.amberpoint.com/amf">
  <ap:webService wsdl="http://localhost:9712/WSID/xml/out/supplier.concrete.wsdl.xml" xmlns:ap="http://namespace.amberpoint.com/amf" xmlns:="http://namespace.amberpoint.com/amf" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"/>
</ap:configuration>


--- RESULT (MSXML processor)

<?xml version="1.0" encoding="UTF-16"?>
<ap:configuration xmlns="http://namespace.amberpoint.com/amf" xmlns:ap="http://namespace.amberpoint.com/amf">
<ap:webService wsdl="http://localhost:9712/WSID/xml/out/supplier.concrete.wsdl.xml" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
</ap:webService>
</ap:configuration>

--- RESULT (EXTERNAL XalanJ processor)

<?xml version="1.0" encoding="UTF-8"?>
<ap:configuration xmlns:ap="http://namespace.amberpoint.com/amf" xmlns="http://namespace.amberpoint.com/amf">
<ap:webService xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" wsdl="http://localhost:9712/WSID/xml/out/supplier.concrete.wsdl.xml"/>
</ap:configuration>