Adding a <x/> instead of <x></x> in a SOAP

I am trying to create a SOAP message that only contains the following line:

How do I this? Currently, it is only producing the following in my SOAP envelope:
</export-adapter name=“SAPSCA”/>

Thanks in advance,
Rumana

Please give some more details.

Is the service service running in Integration Server?
What is the client?
Is it being invoked via a SOAP RPC SoapRequest going to the /soap/rpc URL?
What is in the service pipeline when the service is complete?

If x is in the pipeline with an empty string as the value then should go into the Soap Response.

If x is in the pipeline with an empty string as the value then or should go into the Soap Response.

Also, with IS_4-6_SP1 Soap Responses always contain the xsi:type field, even if nil, in order to interoperate with the maximum number of Soap implementations.