higgins#NormalizedStringAttribute
  subtype:  NormalizedStringSimpleAttribute (pm)
  supertype:  Attribute  Instances of this class are used as the domain of higgins:metadata properties that, taken together, are considered to be the metadata about a higgins:attribute sub-property.
     supertype:  Higgins_Attribute_or_Value
        supertype:  Higgins_object
           supertype:  particular  a 0-order type
              supertype:  individual__particular___supertype_of_1st_order_types  all individuals (for concepts or relations) are implicitely or explicitely instance of that type
                 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 NormalizedStringAttribute; click here to add one.