[JS] Write XML file

Question

Hello 
I read an XML file I y contribution of the change and I want to write it in a new XML file.
I would get this presentation
but I opt cesi
Here is my code :
    leDossierOEBPS = "~/Desktop/content/";
    monEcritureContent(File (leDossierOEBPS + '/content.opf'),File (leDossierOEBPS + '/content5.opf'));
function monEcritureContent(refFile,refFile2) {
   default xml namespace = 'http://www.idpf.org/2007/opf';
    var XMLHeader = '<\?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>';
    var XMLWorkbookHeader = "<\?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>";
    var XMLWorkbookHeader2 = " xmlns=\"http\://www.idpf.org/2007/opf\" unique-identifier=\"bookid\" version=\"2.0\"";
           if(refFile != null) {
                        refFile.open("r");
                        var XMLToParse = refFile.read();
                        refFile.close();
                        XMLToParse = XMLToParse.replace(XMLWorkbookHeader,"");
                        XMLToParse = XMLToParse.replace(XMLWorkbookHeader2,"");
                        var XMLData2 = new XML(XMLToParse);
                        XMLToParse = null;
            } else {
                    alert("Error opening XML file.");
refFile2.open("w");
refFile2.encoding = "UTF8";
refFile2.writeln (XMLHeader+XMLData2.toXMLString());
refFile2.close();
What is the correct control to write the XML tree?
Thank you

Answer 1

I would like to used the class "namespace". 
Currently I use it like this:
default xml namespace = 'http://www.idpf.org/2007/opf';
but I also have to put the two following
unique - identifier = "bookid" version = "2.0".
But my its too short deep.
Thank you