HTML_QuickForm_Controller: How do controller, page, form and action relate to eachother?

I'm trying to relate the different concepts in QF and QFC to eachother and how that fits in the rest of my php/pear world. I guess you usually define one controller object for one .php file you develop? E.g. if I want to deal with all customer order related information in an application, I create one order_management.php file where I use a controller to search for a specific order, to display the order header information, to display a grid with the order lines and add buttons to add and delete orders. A form is something you link an action to, and I guess that relates to a <form> </form> in HTML? And one QuickForm object is just that; everything that goes into that form. Now how does a Form relate to a Page (as in the class HTML_QuickForm_Page); can we have multiple forms in one page? The documentation and the class methods look like you can only add one form per page? I would imagine a page is a collection of forms. For example, if I want to list multiple order lines for one order on a page, and each order line is a form with a 'edit' and 'delete' action, how do I get these forms grouped together?