You should also notice in the example that I always call an actual implementation class to perform the business logic.
您还应当注意到，在示例里我一直调用实际的实现类来执行业务逻辑。
The following update was also made in support to XML document upload, and you may notice the implementation of document to subject and user relationships handling.
还要做以下更新来支持XML文档上载，您可能注意到了主题和用户关系处理的文档实现。
Notice that the universal type 2 and universal type 4 drivers share the same implementation class name.
请注意，通用Type 2和通用Type 4驱动程序具有相同的实现类名称。
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