Types
BloodRhesus
Simple Types
BloodRhesus
See https://www.datadictionary.nhs.uk/data_dictionary/attributes/p/person/person_rhesus_factor_de.asp
xs:string (restricted)
Enumeration:
POS (RhD-Positive (does have the Rh D antigen))
NEG (RhD-Negative (does not have the antigen))