This is the ValueSet that contains all the codes in eHDSI Allergy Certainty (http://terminology.ehdsi.eu/ValueSet/eHDSIAllergyCertainty) and eHDSI Allergy Certainty (http://terminology.ehdsi.eu/ValueSet/eHDSIAllergyCertainty). E.g. what you have to deal with if you get resources containing codes in either of them