private void startXmlDefault(String name, Attributes attrs) {
		// decide on which default object is to be modified
		// then call the method which modifies it
		if (name.equals("slidedefault")) {
			overwriteSlideDefault(attrs);
		} else if (name.equals("textdefault")) {
			overwriteTextDefault(attrs);
		} else if (name.equals("circledefault")) {
			overwriteCircleDefault(attrs);
		} else if (name.equals("shapedefault")) {
			overwriteShapeDefault(attrs);
		}
	}