<PropertyList>
  <tutorial include="startup.xml"/>
  <tutorial include="taxiing.xml"/>
  <tutorial include="runup.xml"/>
  <tutorial include="radios.xml"/>
  <tutorial include="altimeter.xml"/>
  <tutorial include="takeoff.xml"/>
  <tutorial include="landing.xml"/>
  <tutorial include="pattern.xml"/>
  <tutorial include="engine-failure.xml"/>
</PropertyList>