можно ли создать node в пустом xml c помощью xpath в java? дайте примерчик

вот это реализовано в perl:

http://search.cpan.org/~msergeant/XML-XPath-1.13/XPath.pm

setNodeText($path, $text)

Sets the text string for a particular XML node. The node can be an element or an attribute. If the node to be set is an attribute, and the attribute node does not exist, it will be created automatically.
createNode($path)

Creates the node matching the path given. If part of the path given, or all of the path do not exist, the necessary nodes will be created automatically.