Healthcare organizations are facing difficulties when it comes to exchanging clinical data between various systems as they use diverse software systems. To facilitate data interoperability, Health Level Seven (HL7) was developed. HL7 is a set of rules and standards that help standardize clinical data for establishing information interchangeability. It enables healthcare systems to exchange data using messages formatted according to specific clinical data standards. Different software solutions can be connected using an integration engine that turns domain-specific data into HL7 messages. HL7 standards have many versions such as HL7 Version 2, HL7 Version 3, CDA, and FHIR. The newest standard, FHIR, supports different formats and can work with many applications. HL7 standards help medical organizations connect systems with different purposes and are built using distinctive technologies.

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