The problem is empty Docuemnt NamespaceURI

Different ways to create a doc, the need to increase DocumentBuilderFactory.setNamespaceAware (true); so it is not empty Element Node.getNamespaceURI

        Factory = DocumentBuilderFactory.newInstance the DocumentBuilderFactory (); 
        the DocumentBuilder Builder factory.newDocumentBuilder = (); 
        the InputStream resource.getInputStream inputStream = (); 
        the Document DOC = builder.parse (inputStream); 
the Document created in this manner, Element is acquired NamespaceURI generating empty, Element type different from the above and the resulting