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