That's a good question. If you think of a model representing whats behind a view, in a non-web world (stateful), selectedness can very well sit in a model - as long as it represents a state of the view. In this example, the selectedness sits in the collection, however it may sit in the view. See more about this here, for example: http://stackoverflow.com/questions/6519990/best-way-to-make-...