Why do I write this? Because I had the problem a few hours ago that no form was rendered in my backend formular. And as a few of you may know, the FireGento GermanSetup Team met today. Noone of us knew instantly why. So here are a few tipps.
You can set the html attributes
enctype is needed for file uploads. With
action the target of the form is defined, as you should know.
Container yes or no?
As you can see in the code there is another parameter:
use_container you decied wether to wrap a <form> around your form elements and add a form_key.