This is the ValueSet that contains all the codes in JDV_J256_Pays (https://mos.esante.gouv.fr/NOS/JDV_J256-Pays/FHIR/JDV-J256-Pays) and JDV_J256_Pays (https://mos.esante.gouv.fr/NOS/JDV_J256-Pays/FHIR/JDV-J256-Pays). E.g. what you have to deal with if you get resources containing codes in either of them