This week's book giveaway is in the Other Languages forum. We're giving away four copies of Functional Reactive Programming and have Stephen Blackheath and Anthony Jones on-line! See this thread for details.
The DOM packages are only half of the equation. All they allow you to do is to parse an XML document into an internal format. The other half of the equation is a serializer, which allows you to serialize the internal format into an XML document. Here is where you would specify the encoding of the new document: