Relation pm#Higgins_datatype_property (?,?)
  supertype:  pm#Higgins_property
  subtype:  higgins#simpleMetadata (higgins#Value,higgins#DigitalSubject)  Used as the super-Property of some DatatypeProperties whose domain is higgins#ValeAndMetadata or higgins#DigitalSubject to indicate that these properties are considered to be metadata about the ValueAndMetadata (or DigitalSubject)
     subtype:  higgins#subjectId__subjectid (higgins#SubjectRelationship,xsd#normalizedString)
        subtype:  higgins#subjectCUID (higgins#SubjectRelationship,xsd#normalizedString)
     subtype:  higgins#validFrom__validfrom (higgins#TimeSpan,xsd#date)
     subtype:  higgins#validTo__validto (higgins#TimeSpan,xsd#date)
     subtype:  higgins#lastModified (higgins#Value,xsd#dateTime)
     subtype:  higgins#syncConflict (higgins#Value,xsd#boolean)
     subtype:  higgins#lastVerifiedFromSource (higgins#Value,xsd#date)
     subtype:  higgins#lastVerifyAttempt (higgins#Value,xsd#date)
     subtype:  higgins#creationTime (higgins#Value,xsd#date)
     subtype:  higgins#simpleValue (higgins#SimpleValue,higgins#DigitalSubject)
        subtype:  higgins#string (higgins#String,pm#string)
        subtype:  higgins#normalizedString (higgins#NormalizedString,xsd#normalizedString)
        subtype:  higgins#base64Binary (higgins#Base64Binary,xsd#base64Binary)
        subtype:  higgins#integer (higgins#Integer,sumo#integer)
        subtype:  higgins#dateTime (higgins#DateTime,xsd#dateTime)
        subtype:  higgins#boolean (higgins#Boolean,xsd#boolean)
        subtype:  higgins#decimal (higgins#Decimal,xsd#decimal)
        subtype:  higgins#nonNegativeInteger__nonnegativeinteger (higgins#NonNegativeInteger,sumo#nonnegative_integer)
        subtype:  higgins#positiveInteger (higgins#PositiveInteger,xsd#positiveInteger)
        subtype:  higgins#nonPositiveInteger__nonpositiveinteger (higgins#NonPositiveInteger,xsd#nonPositiveInteger)
        subtype:  higgins#negativeInteger (higgins#NegativeInteger,xsd#negativeInteger)
        subtype:  higgins#float (higgins#Float,xsd#float)
        subtype:  higgins#double (higgins#Double,xsd#double)
        subtype:  higgins#long (higgins#Long,xsd#long)
        subtype:  higgins#int (higgins#Int,xsd#int)
        subtype:  higgins#short (higgins#Short,xsd#short)
        subtype:  higgins#byte (higgins#Byte,xsd#byte)
        subtype:  higgins#unsignedInt (higgins#UnsignedInt,xsd#unsignedInt)
        subtype:  higgins#unsignedLong (higgins#UnsignedLong,xsd#unsignedLong)
        subtype:  higgins#unsignedShort (higgins#UnsignedShort,xsd#unsignedShort)
        subtype:  higgins#unsignedByte (higgins#UnsignedByte,xsd#unsignedByte)
        subtype:  higgins#hexBinary__hexbinary (higgins#HexBinary,xsd#hexBinary)
        subtype:  higgins#time (higgins#Time,xsd#time)
        subtype:  higgins#date (higgins#Date,xsd#date)
        subtype:  higgins#gYear__gyear (higgins#GYear,xsd#gYear)
        subtype:  higgins#gYearMonth__gyearmonth (higgins#GYearMonth,xsd#gYearMonth)
        subtype:  higgins#gMonthDay (higgins#GMonthDay,xsd#gMonthDay)
        subtype:  higgins#gDay__gday (higgins#GDay,xsd#gDay)
        subtype:  higgins#gMonth__gmonth (higgins#GMonth,xsd#gMonth)
        subtype:  higgins#anyURI (higgins#AnyURI,xsd#anyURI)
        subtype:  higgins#token (higgins#Token,xsd#token)
        subtype:  higgins#nMTOKEN (higgins#NMTOKEN,xsd#NMTOKEN)
        subtype:  higgins#language (higgins#Language,xsd#language)
        subtype:  higgins#name (higgins#Name,xsd#Name)
        subtype:  higgins#nCName (higgins#NCName,xsd#NCName)