As far as I know, this is not natively supported. However, you can use a python recipe and save your XML file to a folder. The code below illustrates how you can get a handle on a dataset, create a dataframe from it, and then output to XML. I hope it helps!
# -*- coding: utf-8 -*- import dataiku import pandas as pd, numpy as np from dataiku import pandasutils as pdu from lxml import etree as et