var exist = require('exist');

var q = '
  <results>
  {
      for $e in document("orga/events.xml")//event[
          @refgrp = "G1" 
          and from >= "2011-02-12 12:00" 
          and to <= "2011-02-13"]
      return
      <event>
          {$e/@*}
          {$e/title}
          {$e/from}
          {$e/to}
          {$e/location}
      </event>
  }
  </results>';

exist.xquery(q, function (r) {
  for(e in r.results.event)
    console.log(e);
});

var obj = {
    event: {
        '@': {foo: 'bar'},
        bonjour: {
            en: 'hello',
            ko: 'annyung',
        },
        love: 'hate'
    }
};

require('exist').json2xml(obj)

'<event foo="bar"><bonjour><en>hello</en><ko>annyung</ko></bonjour><love>hate</love></event>'

git clone this
cd this
npm link

npm install exist