Choice item answer lookups via "contained" ValueSet answerOptions within Questionnaire

[fredhersch]

Is your feature request related to a problem? Please describe.
Currently, the choice item controls only works for inlined answerOptions.

Describe the solution you'd like

[1] For a Questionnaire that has an expanded "contained" ValueSet

• choice itemControl should be able to lookup the answerOptions when a user starts typing

Describe alternatives you've considered
Inlined answerOptions already supported

Additional context

• The HIV Case Reporting Questionnaire has examples of contained expanded valueSets (for gender)

[fredhersch]

@aditya-07 This looks like relevant context http://hl7.org/fhir/R4/questionnaire.html#choices

[jingtang10]

for this - @fredhersch and @litlfred do we have an example of expanded valueset in contained? @aditya-07 couldn't find any. at the moment we only have non-expanded valuesets in the contained resources list of a questionnaire.

[aditya-07]

@fredhersch @litlfred openhie-covid-case-report.json has contained sets but all of them have compose instead of the expanded CodeSystem.

[fredhersch]

I see the problem @aditya-07 .. We will need to generate our own example. Maybe we can add something simple to an existing one for Yes/No? Happy to have a look at this tomorrow.