Active backup objects will never expire; only inactive backup objects will expire based on the attributes that have been set in the underlying backup copy group.

活动备份文件永远都不会到期；只有非活动备份对象才会到期(基于已在基础备份副本组中设置的属性)。

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These backup objects are bound to a specific management class and are stored according to the attributes of the underlying backup copy group (see Archive and backup copy groups).

这些备份对象被绑定到特定管理类，而这些对象的存储则是根据基础备份副本组(请参阅归档和备份副本组)的属性进行的。

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This article provides a group of powerful procedures that allow for schema-level operations such as logical backup, restore, and copy of all objects in a given schema.

本文提供了一组强大的过程，可以执行模式级操作，比如对给定模式中的所有对象进行逻辑备份、恢复和复制。

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