The evolution of HL7 Standards: V2 to FHIR

HL7 is the abbreviation for the term, Health Level-7.   The organization, HL7, provides international standards for the structuring and transmission of clinical and administrative data in the healthcare domain.   One HL7 interoperability specification used for many years has been version 2.x, otherwise known as V2.  V2 has been a standard used to codify medical (led by billing) information and transmit it between computerized medical systems. The standard was developed and finalized during the 1980s, and thus was optimized for lower memory and storage usage in the very early stages of networked computing; thus it was an implicitly typed flat-file.

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