How to write "targetNamespace" using documentToXmlString service?

Hi everyone… Sorry for my “english speach”

I have a question. I used service pub.xml:documentToXMLString.

I hope the xml like below. so, I set up nsDecls input parameter using pub.xml:documentToXmlString.

so i can set up “xmlns:xsd”,“xmlns:rsm”.

But I don’t know that how to write “targetNamespace”?

example)
<rsm:Waybill
xmlns:xsd=‘XML Schema
xmlns:rsm=‘iata:waybill:1’
xmlns:udt=‘urn:un:unece:uncefact:data:standard:UnqualifiedDataType:8’
targetNamespace=‘iata:waybill:1’>