Do you always have to have a root node with xml/xsd?

Question

Been looking at a tutorial and it has the following xml and xsd.:

Wha

Answer 1

Root node is mandatory. It's also referred to as "Document Element" in W3C's nomenclature.

Definition: There is exactly one element, called the root, or document element, no part of which appears in the content of any other element (reference: section 2.1 of W3C XML specs)