Newbie here, looking to FHIR-enable an existing EHR with a SQL backend using an open source FHIR facade (preferably written in .net). Any suggestions? I looked at HAPI, but looks like that is all java from what I can tell. Also looked at Vonk FHIR Facade, but it is somewhat costly. I’m just looking to create a proof of concept at this point, so I’m hoping there’s some open source solution out there that provides the framework for the REST endpoints and allows me to implement simple code to translate our native SQL data to/from FHIR data and read/write through those endpoints.
But note that the REST end point implementation is the easy part - converting your data to/from FHIR is the difficult part