change of Node.getOwnerDocument()

[Boris Garbuzov]

I am playing with Xerces API as if I unit-tested it on a basic level:
applying every available method in a way so that just it does not fail.
And I noticed some change of Node.getOwnerDocument() after downloading
1.0.3. Now it returned null for the node = document whereas it had
returned a proper document in earlier version. Seems, this later one is
according to specification that always existed? It used to be a bug?