// declare default namespace
marshaller.declareNamespace("wpc", PRODUCER_NAMESPACE);
// add schema location by declaring xsi namespace and adding xsi:schemaLocation attribute
marshaller.declareNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
marshaller.addAttribute("xsi", "schemaLocation", "string",
PRODUCER_NAMESPACE + " http://www.jboss.org/portal/xsd/" + PRODUCER_XSD);
// create an instance of Object Model Provider
ObjectModelProvider provider = new ProducerConfigurationProvider();