Assertion and variable comparaison for a webservice

The XPath Match assertion can compare a request field with a response field. Assuming the request and response belong to the same test step, and assuming there's just one element "import_id_doc_stk" in the request and one element "export_id_doc_stk" in the response, you can configure XPath Match as follows:

XPath Expression:

//*:export_id_doc_stk

Expected result:

${${=context.currentStep.label}#Request#//*:import_id_doc_stk}

or if #Request# does not work:

${${=context.currentStep.label}#RawRequest#//*:import_id_doc_stk} 

${...} forces the expressions to be evaluated rather than treated as literal strings.