Based on RBAC a workflow access control model-OBAC is advanced in the paper.
在RBAC为基础上提出了工作流访问控制模型obac。
The paper gives a conclusion that it is easier to manage and realize workflow access control by OBAC.
应用OBAC可以更容易地管理和实现工作流的访问控制，模型更贴近于生产业务。
RBAC is rather difficult to assign permissions to roles reasonably and is unable to express constraint in complicated workflow access control.
RBAC在工作流访问控制的应用中很难合理地为角色配置权限，而且无法表达复杂的工作流访问控制约束。
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