tree.addStartElement(c_tag);
tree.addAttribute(_dir, "Jpeg");
tree.addAttribute(_type, "0x0001");
tree.addAttribute(_name, "Image Height");
tree.startContent();
tree.addText(""+depth+" pixels");
tree.addEndElement();
tree.addStartElement(c_tag);
tree.addAttribute(_dir, "Jpeg");
tree.addAttribute(_type, "0x0003");