Referencing responses from a select many questions into a subsequent matrix questions

@anupah, you could do it as outlined in the image shared below:

In the survey tab of your XLSForm:

In the choices tab of your XLSForm:

Image 2

In the settings tab of your XLSForm:

Image 3

Data entry screen as seen in Enketo: when nothing is entered

Data entry screen as seen in Enketo: when some choices are selected

Reference XLSForm:

test_reference.xlsx (13.2 KB)