Perhaps the most important choice you have to make about logging is to decide on a scheme that assigns each log message to a particular category.

关于日志，您要做的一个最重要的选择可能是确定一种模式，将每个日志消息分配给一个特定的类别。

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For example, if the message category is related to security, a warning message should be produced if a dictionary attack is detected.

例如，如果这个消息类别是有关安全性方面的，那么如果检测到字典攻击，就应该产生一条警告消息。

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The application validates the category you typed and either displays an error message if the category isn't valid or displays headlines for the category you requested.

该应用程序将验证键入的类别，如果类别无效的话将显示错误消息，或者显示所请求类别的标题。

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