另外，Scheme还拥有丰富的列表和树处理函数库，以及专注于处理这些结构的历史。

Moreover, Scheme comes with a rich library of list and tree manipulation functions, and a history of contemplating manipulation of those very structures.

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然而，有一种实验性的python源代码解析器，它将python源文件作为文档树处理。

However, there is an experimental Python source code parser that treats a Python source file as a document tree.

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将完成两项基本操作：它将XML文档转换成一种更易于进行语法分析的基于行的格式；并且它提供了将XML文档当作可操作树处理的方法。

Does two basic things: it transforms XML documents to a more easily parsed line-oriented format; and it provides methods to treat an XML document as a walkable tree.

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