This is the ValueSet that contains all the codes in SeverityObservationCode (https://smt.esante.gouv.fr/fhir/ValueSet/jdv-hl7-v3-SeverityObservationCode-cisis) and SeverityObservationCode (https://smt.esante.gouv.fr/fhir/ValueSet/jdv-hl7-v3-SeverityObservationCode-cisis). E.g. what you have to deal with if you get resources containing codes in either of them