higgins#SimpleValue
  supertype:  higgins#Value
  higgins#simpleValue:  higgins#DigitalSubject [*,49..*]
  subtype:  higgins#String
  subtype:  higgins#Base64Binary
  subtype:  higgins#NormalizedString
  subtype:  higgins#DateTime
  subtype:  higgins#Boolean
  subtype:  higgins#Decimal
  subtype:  higgins#Integer
  subtype:  higgins#NegativeInteger
  subtype:  higgins#NonNegativeInteger
  subtype:  higgins#PositiveInteger
  subtype:  higgins#NonPositiveInteger
  subtype:  higgins#Float
  subtype:  higgins#Double
  subtype:  higgins#Long
  subtype:  higgins#Int
  subtype:  higgins#Short
  subtype:  higgins#Byte
  subtype:  higgins#UnsignedLong
  subtype:  higgins#UnsignedInt
  subtype:  higgins#UnsignedShort
  subtype:  higgins#UnsignedByte
  subtype:  higgins#HexBinary
  subtype:  higgins#Time
  subtype:  higgins#Date
  subtype:  higgins#GYear
  subtype:  higgins#GYearMonth
  subtype:  higgins#GMonthDay
  subtype:  higgins#GDay
  subtype:  higgins#GMonth
  subtype:  higgins#AnyURI
  subtype:  higgins#Token
  subtype:  higgins#Language
  subtype:  higgins#NMTOKEN
  subtype:  higgins#Name
  subtype:  higgins#NCName

No statement uses or specializes higgins#SimpleValue; click here to add one.