The HL7 v3 RIM
Tim Benson, Grahame Grieve · Health information technology standards · 2016
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.