--- 目录结构规划
--- grape_tec
---  |-- biz（业务逻辑相关）
---  |-- task（Step-NC相关）
---  |-- event（Event相关）

--- 创建GrapeTec2
CREATE CLASS IF NOT EXISTS grape_tec (
)with alias='GrapeTec2', nickname='GrapeTec2', key=manual, ttl=366 day, autosearch, version=true, namespace='grape';

--- step的基类
CREATE CLASS IF NOT EXISTS task: GrapeTec2 (
)with alias='Task2', nickname='Task2', version=true;

--- biz的基类
CREATE CLASS IF NOT EXISTS biz: GrapeTec2 (
)with alias='Biz2', nickname='Biz2', version=true;

--- event的基类
CREATE CLASS IF NOT EXISTS event: GrapeTec2 (
	client_timestamp			 			timestamp,
	server_timestamp			 			timestamp
)with alias='Event2', nickname='Event2', key=sequence, version=true;

create class IF NOT EXISTS Hello : GrapeTec2 (
    aaaa   @World
) ;

create class IF NOT EXISTS World : GrapeTec2 (
    bbbb   Hello
)