提取的元数据包括一些数据模型对象，例如项目类和它们的属性，还有一些管理对象，例如用户定义和访问控制列表。

The extracted metadata includes data model objects, such as item types and their attributes, and administration objects, such as user definitions and access control lists.

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采用消息过滤算法可以在支持对象模型的多级安全系统中实现强制访问控制。

Message filter algorithms can implement mandatory access control in the multilevel secure systems with an object oriented model.

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方案以访问动作为控制对象，着重体现了BLP模型所要求的机密性，同时也对完整性有所考虑。

Using the operating action as object of control, the scheme pay much attention to the confidentiality of BLP Model, and also give consideration to the integrity.

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