Root/Document
The only instance of this object (red rectangle below) is located at the root of the model tree and cannot be created or deleted. The Document object represents the sequence of pages in the document, treated as a single group that starts on the first page and ends on the last page of the document.
Properties in the Properties pane
The Document object has the Output XML name property that is the name of the root element for the output XML displayed in the Output pane of the PDF Extractor. The default name of the document root is Document. To change the default name, type a new name of the root element and press Enter.