Relation higgins#simpleMetadata (Value,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)
  supertype:  Higgins_datatype_property (pm)
  subtype:  subjectId__subjectid (SubjectRelationship,normalizedString)
     subtype:  subjectCUID (SubjectRelationship,normalizedString)
  subtype:  validFrom__validfrom (TimeSpan,date)
  subtype:  validTo__validto (TimeSpan,date)
  subtype:  lastModified (Value,dateTime)
  subtype:  syncConflict (Value,boolean)
  subtype:  lastVerifiedFromSource (Value,date)
  subtype:  lastVerifyAttempt (Value,date)
  subtype:  creationTime (Value,date)
  subtype:  simpleValue (SimpleValue,DigitalSubject)
     subtype:  string (String,string)
     subtype:  normalizedString (NormalizedString,normalizedString)
     subtype:  base64Binary (Base64Binary,base64Binary)
     subtype:  integer (Integer,integer)
     subtype:  dateTime (DateTime,dateTime)
     subtype:  boolean (Boolean,boolean)
     subtype:  decimal (Decimal,decimal)
     subtype:  nonNegativeInteger__nonnegativeinteger (NonNegativeInteger,nonnegative_integer)
     subtype:  positiveInteger (PositiveInteger,positiveInteger)
     subtype:  nonPositiveInteger__nonpositiveinteger (NonPositiveInteger,nonPositiveInteger)
     subtype:  negativeInteger (NegativeInteger,negativeInteger)
     subtype:  float (Float,float)
     subtype:  double (Double,double)
     subtype:  long (Long,long)
     subtype:  int (Int,int)
     subtype:  short (Short,short)
     subtype:  byte (Byte,byte)
     subtype:  unsignedInt (UnsignedInt,unsignedInt)
     subtype:  unsignedLong (UnsignedLong,unsignedLong)
     subtype:  unsignedShort (UnsignedShort,unsignedShort)
     subtype:  unsignedByte (UnsignedByte,unsignedByte)
     subtype:  hexBinary__hexbinary (HexBinary,hexBinary)
     subtype:  time (Time,time)
     subtype:  date (Date,date)
     subtype:  gYear__gyear (GYear,gYear)
     subtype:  gYearMonth__gyearmonth (GYearMonth,gYearMonth)
     subtype:  gMonthDay (GMonthDay,gMonthDay)
     subtype:  gDay__gday (GDay,gDay)
     subtype:  gMonth__gmonth (GMonth,gMonth)
     subtype:  anyURI (AnyURI,anyURI)
     subtype:  token (Token,token)
     subtype:  nMTOKEN (NMTOKEN,NMTOKEN)
     subtype:  language (Language,language)
     subtype:  name (Name,Name)
     subtype:  nCName (NCName,NCName)