So, which statement is valid?
When you consider the SOAP specifications v1.1 : it is MAY be qualified (
Immediate child elements of the SOAP Body element MAY be namespace-qualified.)
When you conform yourself to the Basic Profile v1.1: it MUST be qualified (
R1014 The children of the soap:Body element in an ENVELOPE MUST be namespace qualified.)
So actually, both are correct...
Regards,
Frits