This is the CodeSystem that contains all the codes in BRPopulacaoTradicional (https://terminologia.saude.gov.br/fhir/CodeSystem/BRPopulacaoTradicional) and BRPopulacaoTradicional (https://terminologia.saude.gov.br/fhir/CodeSystem/BRPopulacaoTradicional). E.g. what you have to deal with if you get resources containing codes in either of them