function parseXML() {
  var feed = 'http://stackexchange.com/feeds';

  var xml = UrlFetchApp.fetch(feed).getContentText();
  var root = XmlService.parse(xml).getRootElement();
  var atom = XmlService.getNamespace('http://www.w3.org/2005/Atom');

  var entries = root.getChildren('entry', atom);

  for (var i = 0; i < entries.length; i++) {
    var title = entries[i].getChild('title', atom).getText();
    var categoryElements = entries[i].getChildren('category', atom);

    var updated = entries[i].getChild('updated', atom).getValue();
    var url = entries[i].getChild('id', atom).getValue();
    var summary = entries[i].getChild('summary', atom).getText();
    var user = entries[i].getChildren('author', atom)[0].getChild('name', atom).getValue();
    var userURL = entries[i].getChildren('author', atom)[0].getChild('uri', atom).getValue();

    var regexSubSite = /http:\/\/(.*?).stackexchange\.com/.exec(url);
    var site, siteURL;

    if (!regexSubSite) {
      // If it's not a "subsite"...
      site = /http:\/\/(.*)\.com/.exec(url);
      site = site ? site[1] : 'noneFound';
      siteURL = site ? 'http://www.' + site + '.com' : 'noneFound';
    } else {
      site = regexSubSite[1];
      siteURL = regexSubSite[0];
    }

    // url     - Question URL
    // title   - Question Title
    // user    - Question Author
    // userURL - Author Profile URL
    // site    - Stack Exchange Site Name
    // siteURL - SE Site URL
  }
}