higgins#SimpleValue
  subtype:  higgins#String  higgins#Base64Binary  higgins#NormalizedString  higgins#DateTime  higgins#Boolean  higgins#Decimal  higgins#Integer  higgins#NegativeInteger  higgins#NonNegativeInteger  higgins#PositiveInteger  higgins#NonPositiveInteger  higgins#Float  higgins#Double  higgins#Long  higgins#Int  higgins#Short  higgins#Byte  higgins#UnsignedLong  higgins#UnsignedInt  higgins#UnsignedShort  higgins#UnsignedByte  higgins#HexBinary  higgins#Time  higgins#Date  higgins#GYear  higgins#GYearMonth  higgins#GMonthDay  higgins#GDay  higgins#GMonth  higgins#AnyURI  higgins#Token  higgins#Language  higgins#NMTOKEN  higgins#Name  higgins#NCName
  higgins#simpleValue:  higgins#DigitalSubject [*,49..*]
  supertype:  higgins#Value
     supertype:  pm#Higgins_DigitalSubject_or_Value
        supertype:  pm#Higgins_object
           supertype:  dolce#particular  a 0-order type
              supertype:  pm#individual__particular___supertype_of_1st_order_types  all individuals (for concepts or relations) are implicitely or explicitely instance of that type
                 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:  pm#Higgins_Attribute_or_Value
        supertype:  pm#Higgins_object

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