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Common patterns of terminology use in archetypes and templates

Common patterns of terminology use in archetypes and templates

Text elements for narrative text

No use of archetype internal value sets or external terminology value set.

Data type: DV_TEXT with no constraints.

Example: "Description" elements in many archetypes. 

Text element for a choice of coding (preferred) but where we know that free text may have to be entered

Data type: DV_TEXT with no constraints, and coding with terminology mentioned in comment.

Intent: DV_TEXT will be constrained to DV_CODED_TEXT when coding is used, in a specialisation, template or application.

Examples: Problem/diagnosis name, Medication name.

Text element for coding where there's a set value set that will never change

Data type: DV_CODED_TEXT with an internal value set.

Example: Laterality (left/right).

Text element for coding where we have a fair idea about what the value set could be, but there could be local use cases or mandated national code sets

Data type: Choice of DV_TEXT with no constraints/DV_CODED_TEXT with an internal value set, OR Choice of DV_TEXT with no constraints/DV_CODED_TEXT with an external terminology value set (usually only in national archetypes).

Intent: In specialisations or templates where a local value set is needed, the DV_CODED_TEXT with an internal value set is removed, and the DV_TEXT is constrained to DV_CODED_TEXT and an external terminology value set added.

Example use case: Where coding is definitely preferred but there are exceptions where the value is not yet coded or cannot be coded e.g experimental drugs, foreign products not on national dictionary.

Example: "Overall test status" in OBSERVATION.laboratory_test_result.

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