How to Map the entire XML(Source XML) into one filed(Target Filed)

Hi Folks,

Can anybody help me how to resolve the below requirement.

business requirement Is: in which client wants the complete input xml in one field at target side i.e., to return the input payload as an XML into a single field

for that we assumed XSLT Mapping is the correct. since i am new to XSLT mapping . i gone through the below URL also since i am unable to get the code. Useful XSLT mapping functions in SAP XI/PI

below is the screen shot :

if some one provide me XSLT code for above requirement  that is a great help from your side.

Thanks in Advance

Hari