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