This is the ValueSet that contains all the codes in DiagnosticReport supportInfo codes (http://hl7.eu/fhir/imaging-r5/ValueSet/valueset-diagnosticreport-report-support-info) and hl7VS-VS-observationType (http://terminology.hl7.org/ValueSet/v2-0936). E.g. what you have to deal with if you get resources containing codes in either of them