It's interesting that your idea already has traction. To me, this seems overly complicated. And what I mean by that, is that the user needs to hold the whole c

It's interesting that your idea already has traction. To me, this seems overly complicated. And what I mean by that, is that the user needs to hold the whole concept in his mind. And while this works wonders for very simple scenarios, as things get more complex, everything will end up being more complex and soon the user won't know which is what. I would suggest you employ a grid concept, where you have columns and rows, and bind fields to those. If you're familiar (or want to get familiar) with .Net's xaml Grid control, it handles pretty much every situation you can think of.