Function pm#relation_from_physical_entity_to_time (pm#physical_entity -> pm#time_measure)
  supertype:  pm#relation_to_time
  subtype:  pm#check-in__checkin (pm#physical_entity -> pm#time_measure)
  subtype:  pm#check-out__checkout (pm#physical_entity -> pm#time_measure)


Another search (with same display options)?