Can ODK generate unique codes based on codes from a dropdown list?

Hi!! Do you mean this way...?

Test the form here: https://staging.enketo.getodk.org/preview?form=https%3A//staging.xlsform.getodk.org/downloads/842e14cbfdbf45f1bafe68e577157bf6qcu6txbp/test0101.xml

I have also attached the definition for the form.
test0101.xlsx (9.8 KB)

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