This is the ValueSet that contains codes in both FR Core ValueSet Unavailability Reason (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-schedule-unavailability-reason) and FR Core ValueSet Unavailability Reason (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-schedule-unavailability-reason).