> The first argument is the name of the element, but what is the second one? If the second argument is an object/dictionary, it's attributes. Otherwise, it's t

> The first argument is the name of the element, but what is the second one? If the second argument is an object/dictionary, it's attributes. Otherwise, it's the first child. Alternatively, the ambiguity can be resolved by using null/0 instead of empty attributes.