This is the ValueSet that contains all the codes in Respiratory Rate Measurement Method value set (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-respiratory-rate-meas-method) and Respiratory Rate Measurement Method value set (https://hl7.fr/ig/fhir/core/ValueSet/fr-core-vs-respiratory-rate-meas-method). E.g. what you have to deal with if you get resources containing codes in either of them