Building interfaces for data entry
- Choose your CodeSystem(s) (ideally standardized ones!)
- Choose or define your ValueSets
- The subset of the CodeSystem that is relevant for the data field
- If your ValueSet is small, a picklist can be populated using $expand
- If your ValueSet is large, a typeahead widget can use $expand?filter=xxx
Remember, search is a poor UX when the ValueSet is small and small ValueSets drive selection of the “least wrong” code.
$expand
Retrieve the expansion of the ValueSet subject to a number of parameters
- Result is a ValueSet with an ‘expansion’ element
- Parameters include: filter, count, offset, includeDesignations, includeDefinition, activeOnly, excludeNested, excludeNotForUI, excludePostCoordinated, displayLanguage, limitedExpansion, profile
GET
/POST /ValueSet/$expand
(GET
must have ’url’,POST
must have ‘valueSet’)GET
/POST /ValueSet/id/$expand
This is the main/best way to search for a code!