Rhapsody 解决方案能够以平行的结构或者层级的结构存储模型信息，其中模型中的每一个包都作为文件系统中的目录显示。

The Rhapsody solution is able to store model information in a flat or hierarchical fashion where each package in the model is represented as a directory in the file systems.

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目录向上到更高层级，可能会一直到文件系统的根。

Fileutils would then follow the ".. "directory up much higher, possibly up to the root of the file system.

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把组件层级结构存储到文件系统中(DiskPageStore)，尽量减少session的使用。

Minimized session use by storing component hierarchy in file system (DiskPageStore).

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