设计分为3个模块：节制模块，数据处置模块和显现模块。
The design divides into 3 modules: Control module, data processing module and demonstration module.
数据处置工作人员的一名成员，他负责组织和掩护库文件以及库文件的存取。
A member of data processing staff who is responsible for organizing and maintaining library files and controlling their access.
元数据伴随文件生成而产生，并作为不同传递和处置过程的记录结果。
Metadata is attached to records when they are created and added to as a result of different processes such as sentencing and disposal.
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