V 4符合J2EE 1.2基于安全性角色而不是方法组的授权模型。

V4 conforms to the J2EE 1.2 authorization model, which is based on security roles rather than method groups.

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安全性是更改的另一个主要方面，它体现在从WebSphere安全性授权模型到基于角色安全性的转变中。

Security is another major area of change with the transition from the WebSphere security authorization model to role-based security.

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已有的RBAC模型对于角色的授权是简单的、不全面的，我们提出了对象式以及具有管理功能的角色管理模型。

In this paper we introduce an Object-Oriented and a novel role administrative model of RBAC. In this way, we simplify the administration and implementation of systems.

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