Where can I find information about the different FHIR structures?

Question

I would like to find information on the different FHIR structures, like R4 or R5. Where do I find that information?

Answer 1

Information about the different version of FHIR can be found:
DSTU2: https://hapifhir.io/hapi-fhir/apidocs/hapi-fhir-structures-dstu2/
DSTU3: https://hapifhir.io/hapi-fhir/apidocs/hapi-fhir-structures-dstu3/
R4: https://hapifhir.io/hapi-fhir/apidocs/hapi-fhir-structures-r4/
R5: https://hapifhir.io/hapi-fhir/apidocs/hapi-fhir-structures-r5/