虽然追溯到SAX代码、使用类似DTDParser(参阅参考资料)的工具或甚至自己处理转换，这些都是有意义的，但在API和工具的仓库中您需要JAXP。

Although it often makes sense to drop down to SAX code or use a tool like DTDParser (see Resources), or even handle transformations yourself, you need JAXP in your Arsenal of APIs and tools.

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所有历史汇率都按期间和现状存储，这意味着您可以追溯到一个较早的期间并定位货币转换过程中使用的确切值。

All historical rates are stored by period and actuality, which means that you can go back to an old period and locate the exact values that were used during the currency conversion.

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其他IT工件，如服务模型、消息模型、对象模型和物理数据模型，可在语义上追溯到LDM，并常常由LDM直接转换。

Other IT artifacts, such as service models, message models, object models, and physical data models, can be traced to LDMs semantically and often are transformed directly from LDMs.

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