In the Interface Fields pane, you define the details of each field you want to include in your service interface. Interface fields are grouped by operation. Each operation shows how COBOL fields are mapped between the interface fields. Only the interface fields for the current operation show in this pane. The full service interface is comprised of all of the interface fields for all of the operations combined, in two groups - input and output. They are ordered first by the order of operations and second by the field order in each operation.