EDB system was designed by module and hierarchy. According the level of operation, the system can be divided by Interface Layer, Engine Layer-. Access Layer, Service Layer and Store Layer.
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- EDB系統采取了模塊化和層次化的設計方式，根據操作的層次具體可分為接口處理層(Interface Layer)、數據庫引擎層(Engine Layer)、數據存取層(Access Layer)、數據庫維護層(Service Layer)和數據存儲層(Store Layer)。
