Requirement: Transform source XML message to target JSON.
step1: First create json equivalent xml from any online tool.
step2: use add in studio utility create persistent classes from json equivalent xml and compile it , now target persistent classes are ready
step3: Do the above step for source xml or xsd and generate persistent classes for source and compile it
step4: complete the DTL by selecting root node from source, target persistent classes and complete the mappings and compile it