A tablespace is a logical layer between the database and the container objects that actually hold the data.

表空间是数据库与实际容纳数据的容器对象之间的逻辑层。

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But the ZODB really comes into its own when container objects are placed into the root object which can then, in turn, hold other objects.

但是在将容器对象放到根对象中，然后根对象反过来又可以包含其他对象时，ZODB就真正派上了用场。

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We will have to leave for another time the details of how to create container objects with which full hierarchies of objects can be persisted.

我们必须留出一些时间来介绍如何创建用以持久化完整对象层次结构的容器对象。

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The catalog contains information (metadata) related to the entire contents of the container as well as to individual objects.

FORBES: Storing Information for a Thousand Years

The SIRF standard provides a logical container for a set of digital preservation objects and a catalog of those objects.

FORBES: Storing Information for a Thousand Years