#tidal_flow__tidalflow__tidal_current__tidalcurrent  the water current caused by the tides
  subtype:  tidal_bore  a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)
  part of:  tide
  supertype:  current__stream  a steady flow (usually from natural causes); "the raft floated downstream on the current"; "he felt a stream of air"
     supertype:  flowing__flow  the motion characteristic of fluids (liquids or gases)
        supertype:  change_of_location__travel  a movement through space that changes the location of something
           supertype:  movement__motion  a natural event that involves a change in the position or location of something
              supertype:  happening__occurrence__natural_event__naturalevent  an event that happens
                 supertype:  event  something that happens at a given place and time
                    supertype:  process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
                       supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  process_or_process_description
                          supertype:  processing_thing
                             supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                                supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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