jaxp validation xml transform dom DOMResult xni XMLDocumentHandler xni XNIException w3c dom CDATASection w3c dom Comment w3c dom DocumentType w3c dom ProcessingInstruction w3c dom Text domdocumenthandler xmldocumenthandler setdomresult domresult doctypedecl documenttype node xniexception characters text node xniexception cdata cdatasection node xniexception comment comment node xniexception processinginstruction processinginstruction node xniexception setignoringcharacters ignore