This is the ValueSet that contains all the codes in mCSD Type codes for Endpoint.identifier (https://profiles.ihe.net/ITI/mCSD/ValueSet/MCSDEndpointIdentifierTypeValueSet) and mCSD Type codes for Endpoint.identifier (https://profiles.ihe.net/ITI/mCSD/ValueSet/MCSDEndpointIdentifierTypeValueSet). E.g. what you have to deal with if you get resources containing codes in either of them