Hi,
Here are the requirements for implementing a new project using FHIR and JSON.
The FHIR JSON resource types - Patient, Encounter, etc. - need to be converted to HL7 messages using DTL.
Fast Healthcare Interoperability Resources (FHIR, pronounced "fire") is a draft standard describing data formats and elements (known as "resources") and an application programming interface (API) for exchanging electronic health records