This is the ValueSet that contains all the codes in JDV_J49_UcumUniteLongueur (https://mos.esante.gouv.fr/NOS/JDV_J49-UcumUniteLongueur/FHIR/JDV-J49-UcumUniteLongueur) and JDV_J49_UcumUniteLongueur (https://mos.esante.gouv.fr/NOS/JDV_J49-UcumUniteLongueur/FHIR/JDV-J49-UcumUniteLongueur). E.g. what you have to deal with if you get resources containing codes in either of them