The HL7 v3 RIM

  • Tim Benson
  • Grahame Grieve
Part of the Health Information Technology Standards book series (HITS)


HL7 v3 was designed to address most of the problems with v2. It is based on a reference information model (RIM), with six main classes, Act, Entity, Role, ActRelationship, Participation and RoleLink. Structural attributes are used to specify each class in more detail. These include classCode, moodCode and typeCode. Data types in v3 are based on those in v2.


RIM Strucural attributes Act Entity Role Act relationship Participation Role link id statusCode negationIndicator classCode moodCode activityTime effectiveTime Observation Procedure SubstanceAdministration Supply PatientEncounter Person LivingSubject Player Scoper instanceIdentifier Universally Unique Identifier (UUID) ObjectIdentifier (OID) Code data types nullFlavor realCode TypeId templateId 


  1. 1.
    HL7. HL7 Standards – HL7 Version 3.
  2. 2.
    Russler DC, Schadow G, Mead C, Snyder T, Quade LM, McDonald CJ. Influences of the Unified Service Action Model on the HL7 Reference Information Model. Proc AMIA Symp 1999:930. American Medical Informatics Association.Google Scholar

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© Springer-Verlag London 2016

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Authors and Affiliations

  • Tim Benson
    • 1
  • Grahame Grieve
    • 2
  1. 1.R-Outcomes LtdNewburyUK
  2. 2.Health Intersections Pty LtdMelbourneAustralia

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