这个方便的方法从树根开始一直处理到树叶，构造并填充树。
This convenient method proceeds from the tree root towards the leaves and constructs and populates it.
在Prop 2xml中。初始dom树从预先定义的XML框架构造开始逐个节点地构造初始树，而不是从头开始。
In Prop2XML, the initial DOM tree is constructed from a predefined XML skeleton, instead of constructing the initial tree node-by-node from scratch.
其次，提出从导航路径中利用构造复合后缀树的方法来挖掘用户关键路径，并利用关键路径将用户聚类成不同的兴趣群。
Second, general suffix tree algorithm is used to mine the key path from user's all navigation paths, and using key path to cluster all users into different interest groups.
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