针对现有角色图模型无法进行动态职责分离的问题,提出基于混合层次关系的扩展角色图模型.对角色层次关系进行细化,将混合层次关系引入角色图模型中,给出扩展后角色图模型角色层次的管理功能.实验结果表明,该模型能进行动态职责分离,提高角色图模型的性能.%Aiming at the problem that the existing role graph model can not define Dynamic Separation of Duty(DSOD), this paper proposes an extended graph model based on hybrid hierarchy relation. This model extends the role hierarchy by introducing the hybrid hierarchy, and the role hierarchy management of the extended role graph model is given. Experimental results show that the introduction of hybrid hierarchy makes the definition of DSOD possible, thus enhances the practicability of the role graph model.
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