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.