sowa#structure__physical_mediating_continuant  click here for details
  supertype:  corpuscular_object__corpuscularobject__composite_entity__compositeentity___divisible_entity_with_discrete_parts  self_connected_object whose parts have properties that are not shared by the whole
     supertype:  self_connected_object  object that does not consist of two or more disconnected parts
        supertype:  object__entity_with_spatial_feature  spatial object (space, location or physical object) or description medium/container (e.g., string, language, image); in a 4D ontology, an object is something whose spatiotemporal extent is thought of as dividing into spatial parts roughly parallel to the time-axis
           supertype:  entity  something that can be "involved" in a situation
              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
     supertype:  divisible_entity__divisibleentity  many classifications under this category are application-dependant
        supertype:  entity  something that can be "involved" in a situation
        supertype:  divisible_thing__divisiblething
           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:  nexus__nexu__physical_mediating_thing  click here for details
     supertype:  mediating_thing__mediatingthing  Peirce/Sowa's notion of "thirdness"; click here for details
        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:  continuant__spatial_entity_with_time_independent_identity  click here for details
     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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