is#symbolic_structure
  exclusion:  is#connexionist_structure
  subtype: {is#mathematical_symbolic_structure is#symbolic_structure_not_fully_mathematically_defined}  km#KM_structure (km)
  supertype:  is#IS_structure
     supertype:  pm#description_medium__descriptionmedium  e.g., a syntax, a language, a script, a structure
        supertype:  pm#description  description (content/medium) of an entity or a situation
           supertype:  pm#description_content/medium/container__descriptioncontent/medium/container
              supertype:  pm#non_spatial_object_that_is_not_an_attribute_or_quality_or_measure
                 supertype:  pm#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:  pm#entity  something that can be "involved" in a situation
                       supertype:  pm#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:  cyc#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:  cyc#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:  pm#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

9 statements are about indirect instances of is#symbolic_structure: km#graph3_on_article, km#graph7_on_article, km#graph8_on_article, km#graph27_on_article, km#graph29_on_article, km#graph30_on_article, km#graph3_on_PhD_thesis, km#graph32_on_article, km#graph33_on_article
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