I am building a form using excel that I will then upload on my server and use ODK Collect.
I have a question in the form the requires multiple constraint as follow:
You cannot select "Do not know" and any other option
You cannot select "Decline to answer" and any other option
You can select a max of 3 options.
I am using the following syntax but it appears to be wrong.
not(selected(.,"do_not_know") and count-selected(.) >1) or (not(selected(.,"decline_to_answer") and count-selected(.) >1)) and (count-selected(.)<=3)
Could you advice? Thank you very much!!