<callActivity xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
      xmlns:pm="http://processmaker.com/BPMN/2.0/Schema.xsd"
      id="call-activity-1"
      name="Call Activity 1"
      calledElement="ProcessId-123"
      pm:config="{}"
      validations="1,2,3" />