docs: function(att) {
  		var val = this[att],
  			html = "";
  		switch (gui.Type.of(val)) {
  			case "null":
  			case "undefined":
  				break;
  			default:
  				val = edbml.Att.$encode(this[att]);
  				html += att + "=\"" + val + "\" ";
  				break;
  		}
  		return html;
  	}