Add nodes to XML

my script asks different types of input user , want store info in settings xml file. way dialogs can fall on entered data.

i found out how read xml file , search specific values (xpath), want add new "settings" file. there easy way indesign javascript? code in bold pseudocode want replace real code.

 

 

    var settingsfile = new file(ksettingsfilename);

    if (settingsfile.open("r")) {

        var settingsxml = new xml(settingsfile.read());

        settingsfile.close();

        var currentsettingelement = settingsxml.xpath (settingname);

        if currentsettingelement not exist

            create element , set value

        else

            currentsettingelement.setchildren(settingvalue);

the xml commands in scripting reference include "insertchildafter", "insertchildbefore", "appendchild", "prependchild", , "setchildren". @ least 1 of these ought

 

but it's kind of hard find out how supposed use commands. wasn't there specific xml guide somewhere in scripting resources section of adobe's indesign site?

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