XOM API for Processing XML with Java

[getagrip <getagrip AT web.de>]

Hi, I am trying to figure out how to add children to a Node after having 
used the Node.query() method:

<roles>
 <role id="employee">
  <user>bob</user>
  <user>sally</user>
</role>
<role id="boss"/>
</roles>

Here's the query:

val roles = doc.query("/roles/role")

val role = roles.get(0)
val users = role.query("user")
users.get(0).detach // bob is removed

Now I would like to ADD a node/element to the <role id="boss"/> Node.
Something like this:

roles.get(1).attach(new Element("user").addChild("myself"))

Appart from having a detach() method there is no attach()-method though :-(

Also I would need to have a ParentNode to add a child but in my case as 
you can see the <role id="boss"/> node is empty.

How can I add a child node here? Do I have to iterate the whole Document 
again using "Element"?
But then I would have to explicitly parse every single node and write it 
back to the doc which would be too tedious.

Thanks for hints, getagrip