#numeration_system__number_system__number_representation_system__system_of_numeration  any notation for the representation of numbers
  subtype:  positional_notation  a numeration system in which a real number is represented by an ordered set of characters where the value of a character depends on its position
  supertype:  mathematical_notation  a notation used by mathematicians
     supertype:  notation__notational_system  a technical system of symbols used to represent special things
        supertype:  writing.symbols  letters or symbols written or imprinted on a surface to represent the sounds or words of a language; "he turned the paper over so the writing wouldn't show"; "the doctor's writing was illegible"
           supertype:  written_communication__writtencommunication__written_language__writtenlanguage  communication by means of written symbols
              supertype:  communication  something that is communicated between people or groups
                 supertype:  description_content/medium/container__descriptioncontent/medium/container
                    supertype:  non_spatial_object_that_is_not_an_attribute_or_quality_or_measure
                       supertype:  non_spatial_object__nonspatialobject  abstraction or description content/medium/container (a description medium that has some spatial feature is both instance of sumo#object and pm#non_spatial_object
                          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:  intangible  The collection of things that are not physical -- are not made of, or encoded in, matter. Every cyc#Collection is a cyc#intangible (even if its instances are tangible), and so are some cyc#individuals.  Caution: do not confuse `tangibility' with `perceivability' -- humans can perceive light even though it's intangible--at least in a sense.
                             supertype:  partially_intangible__partiallyintangible  The collection of things that either are wholly intangible (see cyc#Intangible) or have at least one intangible (i.e. immaterial) part (see cyc#intangibleParts). This includes intangible individuals, such as instances of cyc#Number-General  or cyc#Agreement, as well as non-individuals (all of which are intangible), i.e. instances of cyc#SetOrCollection.  It also includes things that have both tangible and intangible components (see cyc#CompositeTangibleAndIntangibleObject),  such as a printed copy of a newspaper (as its information content is intangible) or a person (as her mental states are intangible).
                                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:  social_relation  a relation between living organisms (especially between people)
                    supertype:  relation  an abstraction belonging to or characteristic of two entities or parts together
                       supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
                          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

No statement uses or specializes numeration_system; click here to add one.