<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:camunda="http://activiti.org/bpmn" id="test" targetNamespace="http://bpmn.io/schema/bpmn">

  <process id="Process_1">
    <userTask id="userTask"
        camunda:assignee="test"
        camunda:async="true"
        camunda:dueDate="2014-02-27"
        camunda:exclusive="false"
        camunda:priority="12">
    </userTask>

    <serviceTask id="serviceTask"
        camunda:expression="${test}"
        camunda:resultVariable="test"
        camunda:type="mail">

    </serviceTask>
  </process>
</definitions>