om.DomDocument.getDocumentElement
Returns the root node element of the DOM document.
Syntax
getDocumentElement()
  RETURNS om.DomNode
Usage
The method getDocumentElement() returns the root om.DomNode
                element node of the DOM document.
To hold the reference to the root node, define a variable with the om.DomNode
type.
Example
MAIN
  DEFINE mydoc om.DomDocument
  DEFINE n om.DomNode
  LET mydoc = om.DomDocument.create("Test")
  LET n = mydoc.getDocumentElement()
END MAIN