This is the ValueSet that contains all the codes in BeVSHolderCode1 (https://www.ehealth.fgov.be/standards/fhir/mycarenet/ValueSet/be-vs-holder-code-1) and BeVSHolderCode1 (https://www.ehealth.fgov.be/standards/fhir/mycarenet/ValueSet/be-vs-holder-code-1). E.g. what you have to deal with if you get resources containing codes in either of them