Root element – PB Docs 2021

You can change the name of the root element, add attributes and
children, and insert comments, instructions, and, if they do not
already exist, XML and/or document type declarations before it.

Changing the name of the root element changes the name of its
start and end tags. You can change the name using the Edit menu item,
or in the Element Attributes dialog box. Changing the name of the
document type declaration, if it exists, also changes the name of the
root element, and vice versa. The root element name is always the same
as the document type declaration name.

You can add the following kinds of children to the root
element: