推动这种扩展的动力是允许我们将访问控制分离到一个通用的框架，该框架使用基于所有权和特定关系的策略。
The driving motivation behind this extension is to allow us to separate access control into a generalized framework that USES policies based on ownership and special relationships.
本文通过对业务逻辑的抽象与提取，形成了通用数据库访问控制框架及在此框架下的访问控制要素的聚类模型。
Based on generalized framework for access control, the author has developed an application model on universal database by conceptual and extract business logics.
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