Document.createTextNode(null) and CharacterData.setData(null)

Hi there,

My question is whether
	Document.createTextNode(null)
is allowed (the same goes for CharacterData.setData(null)).

I could not find anything in the specification that disallows it.
If it is allowed, what should happen when I do (in the Java-binding)
	Text someText = document.createTextNode(null);
	System.out.println(someText.getLength());
	System.out.println(someText.getData());
	someText.appendData("bar");
	System.out.println(someText.getData());
And what do I do on serialization in load/ save?

If it isn't allowed, what exception should I throw?

(currently, we simply allow it to be null, although appendData dies)

Kind regards,

--Sander.

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