This is the ValueSet that contains all the codes in eHDSI Reference Range Meaning (http://terminology.ehdsi.eu/ValueSet/eHDSIReferenceRangeMeaning) and eHDSI Reference Range Meaning (http://terminology.ehdsi.eu/ValueSet/eHDSIReferenceRangeMeaning). E.g. what you have to deal with if you get resources containing codes in either of them