Sets the code identifier for the application referenced by this IReferenceAppId.
引用的应用程序的代码标识符。
The business component code must be able to map this identifier to its back end data.
业务组件代码必须能够将这个标识符映射到其后端数据中。
Uname -u gives the plant code and machine identifier.
uname - u给出厂家代码和计算机标识符。
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