Patterns >> MVC
View: "Hey, controller, the user just told me he wants item 4 deleted." Controller: "Hmm, having checked his credentials, he is allowed to do that... Hey, model, I want you to get item 4 and do whatever you do to delete it." Model: "Item 4... got it. It's deleted. Back to you, Controller." Controller: "Here, I'll collect the new set of data. Back to you, view." View: "Cool, I'll show the new set to the user now."