Oh, wow, I don't think this is going to be possible as described - I don't think you can nest a repeating section from another data source inside another one. So - maybe there would be a way to add a button to the repeating table that shows the review section & sets the Category ID - have to be careful with that if there are multiples. Is the net result that you need users to open a form, fill out a review for every single category and then submit? That is, you are collecting Reviews for a number of categories for every user?
Hilary Stoupa
