You can map fields that are in a relational structure to the hierarchical structure used by the web service application.
tab for the Target transformation, the fields in the
appear in hierarchical format. The target fields are determined by the request message structure of the operation you select for the Target transformation.
Each source object displays as a group in the
area. You can select fields in the Input Fields area to map the fields to the request. If the input fields include multiple input groups, map the groups to the corresponding nodes in the request. Be sure to map all of the fields that you require in the request.
The following image shows an example of mapped input fields from the source file with the REST V2 target to update employee details: