From the first time I started working with Oracle Application Express (several years back) I liked it. Only few small things bothered me at time, but with every version it always got better. For example I hated tabular forms, but love to use interactive grids now. The only thing I don’t recall ever changing are cascading list of values. I still use them, but some native behaviour bothers me every time I implement them. Mainly I’m speaking about the fact, if you change parent list, all cascading child lists are refreshed and all selected values are cleared. In select lists it can be overlooked, but where it infuriate me are shuttle boxes, where – in cascade you might have several shuttle boxes, selected dozens items, just to be cleared if you remove one item from the parent box. This problem lead to article you’re about to read.