The figure shows a screenshot of a portion of the SOAOrderBooking.bpel page in JDeveloper. The screenshot shows the activities in the "NotifyCustomer" scope (the graphic shows the name of the scope as "Email_1"):
"EmailParamsAssign" assign activity
"InvokeNotificationService" invoke activity. There is an arrow going from this activity to the "NotificationService" partner link icon, located in the Services swimlane.