perm = proxy.doc.getPermissions();
perm = proxy.getDocument().getPermissions();
	public Sequence eval(Sequence[] args, Sequence contextSequence)		throws XPathException {		Permission perm = null;			NodeValue node = (NodeValue)args[0].itemAt(0);		if(node.getImplementationType() == NodeValue.PERSISTENT_NODE) {			NodeProxy proxy = (NodeProxy)node;			perm = proxy.doc.getPermissions();			if(perm == null)				return Sequence.EMPTY_SEQUENCE;			else				return new StringValue(perm.getOwner());						}		return Sequence.EMPTY_SEQUENCE;	}