DAO所操作的对象通常称为值对象，尽管术语数据传送对象(data transfer object, DTO)的意思更为贴切。

The objects that DAOs operate on are usually called value objects, although the term data transfer objects (DTO) is more meaningful.

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这意味着对象的结构与XML的结构没有联系-您可以重新构造对象类，而不必更改用于外部数据传送的xml格式。

This means the structure of your objects is not tied to the structure of the XML — you can restructure your object classes without needing to change the XML format used for external data transfer.

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对象数据库管理小组(odmg)主页是另一个有关将XML用作数据传送格式的信息的资料来源。

The Object Database Management Group (ODMG) home page is another source of information on use of XML as a data-transport format.

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