Far from just a pretty picture, the model must be a complete representation of the data you are storing, or it will be of little use to anybody.
远远不只是一副漂亮的图画，该模型必须是所存储数据的完整表示，否则，它对于任何人都毫无用处。
As such, it USES trees and nodes as its model for storing and processing XML data.
因此，它采用树和节点作为模型来存储和处理XML数据。
The problem with this approach is that if you are storing the data as XML and you are using the Object Model in the application, all kinds of mapping and transform issues arise.
这种方式的问题是，如果以xml格式存储数据，而在应用程序中使用对象模型，就会产生各种映射和转换问题。
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