在FLASH中类的格式是怎样的?请发个好的样式!!!

package xxx.xxxx
{
//import flash.filters.GlowFilter;
import flash.events.MouseEvent;

import mx.collections.ArrayCollection;
import mx.containers.Canvas;
import mx.controls.Image;
import mx.controls.Label;
//import mx.core.UIComponent;

/**
* <strong>基本图形模块类</strong>
*
* @author: zhuwd
* @date: 2009-1-26
*
*/
public class BaseModule extends Canvas
{
private var _ID:int;
private var _Type:String;
private var _Name:String;
private var _InNumber:int;
private var _OutNumber:int;
private var _InItems:ArrayCollection;
private var _OutItems:ArrayCollection;
private var _Selected:Boolean;
private var _CurrentInOutIndex:String;//格式 "in$1" "out$3"
private var _ConnectState:Boolean;
private var _InConnections:ArrayCollection