This is the ValueSet that contains all the codes in US Core Provenance Participant Type Codes (http://hl7.org/fhir/us/core/ValueSet/us-core-provenance-participant-type) and US Core Provenance Participant Type Codes (http://hl7.org/fhir/us/core/ValueSet/us-core-provenance-participant-type). E.g. what you have to deal with if you get resources containing codes in either of them