JAXB namespace prefixes missing

You can use the @XmlSchema annotation on a package-info class to assign a prefix to the namespace:

@XmlSchema(
    namespace = "http://poc.cmc.com/ScreenLayout",
    elementFormDefault = XmlNsForm.QUALIFIED,
    xmlns={@XmlNs(prefix="ns0", namespaceURI="http://poc.cmc.com/ScreenLayout")})    
package your.package;


import javax.xml.bind.annotation.*;