在信息管理系统中，经常会遇到信息的维护操作，树型目录以它直观性的特点在信息维护中起到重要的作用。
In information management system, the maintenance of information must be realized, the tree type catalogue has an important role in the system.
您可以在服务器端采用目录结构，在客户端创建一个树型表示。
You are taking the directory structure represented on the server and creating a tree representation on the client.
它在目录(树型)视图中显示建模项目、uml模型，及其uml图，如图3所示。
It displays the modeling projects, the UML models, and their UML diagrams in a directory (tree) view, as Figure 3 shows.
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