the process's version is five..,find the sub-workflow is four.

<?xml version="1.0" encoding="UTF-8"?>
<process-definition xmlns="urn:jbpm.org:jpdl-3.1" name="SubProcess">
 <swimlane name="applicant">
 <assignment class="com.bpm.oa.assignment.ApplicantSwimlane" />
 </swimlane>
 <start-state name="Start">
 <task swimlane="applicant">
 <controller>
 <variable name="approvedBoolean" />
 </controller>
 </task>
 <transition name="" to="Task"></transition>
 </start-state>
 <process-state name="InvokeTimeout">
 <sub-process name="SubProcess"></sub-process>
 <variable name="approvedBoolean" mapped-name="approvedBoolean" />
 <transition name="end" to="end"></transition>
 </process-state>
 <end-state name="end"></end-state>
 <task-node name="Task">
 <task swimlane="applicant">
 <controller>
 <variable name="approvedBoolean" />
 </controller>
 </task>
 <transition name="" to="Task1"></transition>
 </task-node>
 <task-node name="Task1">
 <transition name="" to="InvokeTimeout"></transition>
 </task-node>
</process-definition>