Difference between "save" and "send"

With the form save button you could attach a ‘save’ or ‘send’ action, but does anyone know the difference?

form.send - sends current data to the serve by AJAX call ( works similar to normal form submit )

form.send("my.php")

form.save - can be used if you are using a form with a dataprocessor, command triggers start of data saving through dataprocessor

form.save();