Node without parent eligible for garbage collection or pinned by Document?

[Gary Hirschhorn]

If I create new Nodes via Node.createClone() or Document.newElement(), I
now have a Node that belongs to a Document, but has no parent Node. With
regards to garbage collection, if this new Node is no longer reachable
by the objects in my code, is it eligible for garbage collection, or is
there some internal pointer from Document that will pin this Node in
memory until the Document is garbage collected?  

 

Thanks,
Gary