This is the ValueSet that contains all the codes in Allergy Intolerance (with exceptions) (http://hl7.eu/fhir/hdr/ValueSet/allergy-intolerance-eu-hdr) and Allergy Intolerance (with exceptions) (http://hl7.eu/fhir/hdr/ValueSet/allergy-intolerance-eu-hdr). E.g. what you have to deal with if you get resources containing codes in either of them