1.Understanding HL7 FHIR
As a contributor the the eHealth ecosystem, you will need to familiarize yourself with the basics of the HL7 FHIR standard. Numorous introductions are available on the internet, but using the links below, you can find documentation that is relevant to the Infrastructure.
FHIR for Architects
Official FHIR introduction for Architects
FHIR for Developers
General introduction