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。
To provide a direct and precise description for workflow access control, an access control model for workflow systems was developed based on graph and graph transformation.
为了直观和准确地描述工作流访问控制，提出了一个基于图的工作流访问控制模型。
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。
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。
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