Understanding version 3

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The Version 3 development by HL7 marks a significant advancement in healthcare electronic information standards, gaining endorsement globally and serving as the foundation for an ISO international standard on healthcare messaging. The extensive V3 documentation can be challenging to navigate, prompting HL7 UK to create this Primer to assist its members in understanding V3. Careful attention was given to ensure that users can quickly grasp the key aspects of the V3 methodology. Since its 2003 release, over 2,500 copies have been sold, with translations in French and Japanese. As the Version 3 standard has evolved, this Primer has been thoroughly revised to align with the Normative Edition of the standard, making it essential for both newcomers and those with previous editions. The Primer aims to empower a broader audience to comprehend HL7 Version 3 and its role in enhancing healthcare communication within their organizations. It covers topics such as the HL7 organization, the advantages of V3, key concepts, message construction, vocabularies, and implementation specifications. Additionally, it addresses various technical aspects, including data types, message transmission, and tooling, providing a comprehensive resource for understanding and utilizing HL7 V3 effectively.