Templates and Archetypes GF.fm - HL7

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transactions or compositions and to complete messages. The guide is that these areonly expressed in terms of organisational and primary archetypes.In the current proposed approach by the Templates SIG, primary archetypes would alsoapply to RMIM segments where there was a need for semantic differentiation.Figure 5: The relationship of the artefactsUseRe-useTemplatesopenEHR templateCDA document template OrganisationalHL7 message template archetypesopenEHR organiser archetypeCDA section templatePrimaryarchetypesopenEHR entry archetypeCDA entry templateConvention(best practice)Semantics(knowledge)The proposal to use both the terms templates and archetypes in a specific manner, hasconsiderable advantages for the following reasons:• The EHR SIG and HL7 Templates group can use the same language to describedifferent artefacts shared by both communities.• The essentially different artefacts will be differentiated by name, thus avoidingconfusion when using the term template generically.• The technology to express both ‘organisational’ and ‘primary’ archetypes canbe the same in each setting.• A shared ontology of key concepts – ‘primary archetypes’ - that fill the semanticgap between information models and terminology can be developed in acontrolled environment.• A shared registry of ‘organisational’ archetypes can grow in a less controlledmanner in response to specific use environments.• A shared registry of templates that allow localisation and extensibility cangrow in an open and collaborative manner.The resulting view of the information space involves 4 key components:• The information model (RIM/RMIM or openEHR reference model)• Templates which express the data entry requirements in a particular situation• The organisational archetypes - supporting navigation and style or ‘clinicalinteroperability’• The primary archetypes - supporting semantic interoperability• The vocabulary - supporting semantic interoperabilityFigure 6: The semantic spaceTemplatesInformation modelOrganisationalarchetypesPrimaryarchetypesVocabularyWordsTermsPhrases
“How things are stored does not reflect on what they mean - returns from a query areusually based on the meaning...” Alan RectorPlease send comments to:sam.heard@bigpond.com
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Templates and Archetypes GF.fm - HL7

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