This is the ValueSet that contains all the codes in Vital Signs Units (http://hl7.org/fhir/ValueSet/ucum-vitals-common) and ICD10 Causes of Death ValueSet (http://hl7.org/fhir/us/vrdr/ValueSet/vrdr-icd10-causes-of-death-vs). E.g. what you have to deal with if you get resources containing codes in either of them