Relation pm#Higgins_annotation_property (?,?)
  supertype:  pm#Higgins_property
  subtype:  higgins#base (?,?)
  subtype:  higgins#fractionDigits (?,?)
  subtype:  higgins#length (?,?)
  subtype:  higgins#maxExclusive__maxexclusive (?,?)
  subtype:  higgins#maxInclusive__maxinclusive (?,?)
  subtype:  higgins#maxLength__maxlength (?,?)
  subtype:  higgins#minExclusive__minexclusive (?,?)
  subtype:  higgins#minInclusive__mininclusive (?,?)
  subtype:  higgins#minLength__minlength (?,?)
  subtype:  higgins#pattern (?,?)
  subtype:  higgins#totalDigits (?,?)