how to convert my data Fhir into Hl7 version 2 or H2 data base?
You can look at the v2 to FHIR IG for some inspiration on how to do the reverse, though you’d still have to infer what the event codes were and determine what combination of resources you’d need to look up to satisfy the v2 requirements of the target system. (Expectations tend to vary significantly between different systems.)
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