The model offers a uniform method of conceptual view of the diverse data as a sequence of bits and a uniform method of keeping and processing this sequence on the external storage.

该模型提供一个一致的方法，以一个为序列作为各种数据的概念视图；并提供一个一致的方法在外部存储器上保存和处理这些为序列。

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Data storage and management, and the external user how to access data are all depend on the functions provided by database, so spatial database functions is the key part of the spatial database.

空间数据库功能是数据库的关键部分，数据库内部的数据存储与管理，外部用户如何使用这些数据，都是靠功能来实现的。

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