Workspace-based authorization management model introduces workspace concept, which founds a connection between users and authorization to implement system.

在权限管理模型中，引入了工作空间的概念，通过工作空间把用户和权限联系起来。

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According to the shortcomings of the traditional PDM security management, this paper establishes a workspace-based authorization management model and a DPDM network security model.

本文针对传统PD M安全管理的缺点，建立了基于工作空间的权限管理模型和网络安全模型。

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This paper first describes the ERBAC mainframe of the management of authorization, and then gives the formal rules that ERBAC model must meet.

给出了ERBAC的动态授权管理框架，最后用形式化语言描述了ERBAC模型满足的规则。

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