achines different
  orthogonal regions often do not specify transitions for the same events.
  For the rare cases when they do, the UML behavior can easily be emulated as
  follows:</p>

  <p><img alt="SimpleEventDispatch" src="SimpleEventDispatch.gif" border="0"
  width="466" height="226"></p>

  <h4>Transitions across orthogonal regions</h4>

  <p><img alt="TransAcrossOrthRegions" src="TransAcrossOrthRegions.gif"
  border="0" width="226" height="271"></p>

  <p>Transitions across orthogonal regions are cu