An instance of class
manages the output XML stream. For links to the
documentation for this class, see Section 2, “XSL-FO resources”.
This function writes the opening
<root> tag of the root element of the
output XSL-FO file. The function returns a token, a
sox.Elt instance, that you must use later
to generate the closing tag. When all the document's
content has been generated, be sure to call the
.end() method of this token, and then close the
Sox instance by calling its
.close() method. If you don't perform both
these steps, there is no guarantee that the file will
have been written completely to the output file.