process-definition.xml

<?xml version="1.0" encoding="UTF-8"?>
<definitions 
  id="definitions"
  targetNamespace="http://activiti.org/bpmn20" 
  xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:activiti="http://activiti.org/bpmn">

  <process 
      id="pictureRequest" 
      name="A process that handles picture requests by users">
    
    <startEvent id="theStart" />

    <sequenceFlow 
      id="flow1" 
      sourceRef="theStart" 
      targetRef="myManualTask" />

    <userTask 
        id="myManualTask" 
        name="Stub task" 
        activiti:formKey="approval.form">
      <potentialOwner>
        <resourceAssignmentExpression>
          <formalExpression>user(kermit), group(management)</formalExpression>
        </resourceAssignmentExpression>
      </potentialOwner>
    </userTask>
  
    <sequenceFlow 
      id="flow2" 
      sourceRef="myManualTask" 
      targetRef="theEnd" />

    <endEvent id="theEnd" />
  </process>
</definitions>