@basualdo, kindly please be informed that I just checked the feature with the HHI server and it works. Please be informed that this feature at the moment only works with Collect android app while Enketo does not support it. You could design your xlsform as outlined in the image shared below:
In the survey tab of your xlsform:
In the choices tab of your xlsform:
In the external_choices of your xlsform:
Or, you could simply list out the unique list_name as shown in the image below:
In your CSV file:
Reference xlsform:
select_one_external.xlsx (12.8 KB)
Reference CSV file:
itemsets.csv (348 Bytes)
