令牌总线使用了物理总线拓扑结构，但同时也有一个令牌传递方案，用来判决每台计算机对总线的访问权限。
Token bus USES a physical bus topology, but also USES a token-passing scheme to arbitrate access to the bus.
授予传递上下文权限的示例。
其他的限制还有：用户是否需要得到权限才能传递内容、内容的格式有何要求以及目标受众是谁。
Other restrictions include whether the user needs permission to transfer the content, in what format the content must be, and who the target audience is.
如下的这些示例展示了资源如何使用、资源的权限如何被传递或重用以及数字资源如何管理。
Below are some examples of how assets can be consumed, how the rights over the assets can be transferred and reused, and how digital assets are managed.
因此，任何有权在SYSTEM.COM MAND .INPUT或它的别名上传递或设置身份上下文的用户都有可能使用其他userid的权限发出命令。
Therefore any user that has the authority to pass or set identity context on SYSTEM.COMMAND.INPUT or its alias can, potentially, issue a command with some other userid's authority.
登录到Web应用程序的用户不应具有直接访问消息传递提供程序的权限，因为如果这样做，他们就可以绕过应用程序的业务逻辑。
A user who logs into a Web application should not have direct access to the messaging provider, as it could give them the ability to bypass the application's business logic.
权限传递约束提高了访问控制的粒度，使得访问控制的粒度能够达到元素或属性级。
The permission propagation constraint improves the access control grain. It makes the grain reach element or attribute level.
例如，如果代码只根据向它传递的输入来计算结果而不使用任何资源，则可能不必请求权限。
For example, a permission request might not be necessary if the code simply computes a result based on inputs passed to it, without using any resources.
特别是，它表示最小使用权限，以致任何要传递这两个使用权限集合的需求也会传递它们的交集。
Specifically, it represents the minimum permissions such that any demand that passes both permission sets also passes their intersection.
堆栈上的所有调用方必须传递指定的权限或标识。
All callers on the stack must have the specified permission or identity to pass.
堆栈上的所有调用方必须传递指定的权限或标识。
All callers on the stack must have the specified permission or identity to pass.
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