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

--- 创建GrapeTec
create class if not exists /grapetec() 
with key=manual, ttl=366 day, autosearch, nickname='GrapeTec', version=true;

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

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

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