The BPEL process file of each detail process defines coordination with the master process.

A receive signal activity indicates that the detail process shown in the following example waits until it receives a signal executed by its master process. The label value (startDetailProcess) matches with the label value in the signal activity of the master process.

<bpelx:receiveSignal name="waitForNotifyFromMasterProcess"
   label="startDetailProcess" from="master"/>

A signal activity indicates that the detail process shown in the following example signals its associated master process at runtime that processing is complete. The label value (detailProcessComplete) matches with the label value in the receive signal activity of each master process.

<bpelx:signal name="notifyMAsterProcess" label="detailProcessComplete"
   to="master"/>