Can an XML element in one namespace containa child element in another, blank one with CXF?

So, I've been working on some simple SOAP-based webservices to integrate our systems with a commercial product. I've been using Apache CXF to generate Java classes from the WSDLs generated by the product, and I seem to have hit a bit of a wall. Basically, part of the SOAP service in the product expects something of the form

<ReadProject xmlns="http://www.niku.com/xog/Object">
    <DataBus xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xsd/xog_read.xsd" xmlns="">
        <Header version="12.0.0.5028" externalSource="NIKU" />
        <Query>
            <Filter name="projectID" criteria="EQUALS">PR117</Filter>
        </Query>
    </DataBus>
</ReadProject>

I'm still new to webservices and XML, so I don't really know what to ask Google to figure out how to make the namespace of the <DataBus> be different from the other tags. I have a suspicion that the product's XML isn't valid too, since the namespace is blank. Is there a way to write a WSDL or XSD file to make this happen in CXF?