相反，它只需要程序员将属性标记为持久性的，并识别出能代表对象唯一标识符(或者主键)的属性。

Instead, it requires the developer only to denote the attributes to be persisted and to identify the attribute to represent the object's unique identifier (or primary key).

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每个模式元素都被全球唯一的对象标识符（OID）所标识。

Each schema element is identified by a globally unique Object Identifier (OID).

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GUID对象，用作驱动程序和芯片集对的唯一标识符。

GUID object that is used as a unique identifier for the driver and chip set pair.

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