wml dom wml WMLDOMImplementation dom DOMImplementationImpl dom DOMMessageFormatter dom DocumentImpl w3c dom DOMException w3c dom DOMImplementation w3c dom w3c dom DocumentType w3c dom wmldomimplementationimpl domimplementationimpl wmldomimplementation domimplementationimpl singleton wmldomimplementationimpl domimplementation getdomimplementation singleton createdocument namespaceuri qualifiedname documenttype doctype domexception doctype doctype.getownerdocument domexception domexception.wrong_document_err dommessageformatter.formatmessage dommessageformatter.xml_domain documentimpl doc wmldocumentimpl doctype qualifiedname namespaceuri doc.createelementns namespaceuri qualifiedname doc.appendchild doc