针对著名的 RBAC96模型的不足之处 ，结合私有权限、部门权限和权限属性变化等问题 ，对角色权限及角色层次关系进行了分析 ，提出了一个改进的角色层次化关系模型 。
In this paper, we introduce the role-based access control model, analyse the role hierarchy model and the problem of private permissions in RBAC96, and point out the disadvantage of Sandhu s solution.
该表示在最高的抽象层次上展示了角色和过程之间的关系，这适用于概括了解业务过程。
This representation shows the relationship between roles and processes at a high level of abstraction, which is suitable for getting an overview of a business process.
关系型数据库已经超越了持久性存储设备的角色，它们还解决了上述层次数据库的两个缺点。
They also address the two shortcomings of hierarchical databases listed above. The major characteristics of relational type databases are.
在完整的接口核心组件设计中，组件的层次调用关系扮演了很重要的角色。
In the total design of interface core component, the relationship of calling plays an important role.
对各层次利益相关者的相互关系进行的剖析，明确了各利益相关者的角色定位。
Through analyzing the relationship among the all levels of stakeholders, the role orientation of stakeholders is clarified.
基于对RBAC模型及相关模型中角色继承规则，引入权限组等概念，提出了一个改进的角色与权限层次关系模型。
Based on the RBAC model and related role inheritance rules, concepts such as permission group and an improved role hierarchy and permission hierarchy model are introduced.
基于对RBAC模型及相关模型中角色继承规则，引入权限组等概念，提出了一个改进的角色与权限层次关系模型。
Based on the RBAC model and related role inheritance rules, concepts such as permission group and an improved role hierarchy and permission hierarchy model are introduced.
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