维度建模最重要的活动之一就是捕获聚集路径或终端用户执行上卷和下钻所依照的聚集层次结构。

One of the essential activities of dimension modeling is to capture the aggregation paths or aggregation hierarchies along which end users perform roll-up and drill-down.

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TypeFilter可以具有多个输出终端，通过判断工具中定义的消息类型是否匹配运行时中的消息类型，决定采用哪一种路径路由消息。

The TypeFilter can have multiple output terminals that route the message down different paths, depending on whether the message type defined in the tooling matches the type found at runtime.

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接着，打开一个命令行终端，键入cd+空格+你下载的文件的路径（通常是你主文件夹中的~/Desktop）。

Next, open up a command line terminal and type cd followed by a space and the destination directory of the file you've just downloaded (this is normally going to be ~/Desktop for your desktop.

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