targetNamespace and xmlns without prefix, what is the difference?

Question

In an xml schema document, if I have both the targetNamespace and the xmlns without a prefix.

Answer 1

xmlns

The xmlns attribute sets the default name space of the described element. The default name space is thus applied to all the elements inside the described element, which do not explicitly declare another name space for themselves.

The default name space is set to a standard value for WSDL files: http://www.w3.org/ns/wsdl

targetNameSpace

This attribute contains the name space of your web service. You can choose this name space freely, but there is a convention saying that the URI should point to the WSDL of the service.

xmlns:tns

This name space should be set to the same URI as the targetNameSpace attribute. That way you can refer to the target name space via this name space prefix (tns).

Source : http://tutorials.jenkov.com/wsdl/description.html