• 1. data-payload header: 数据加载的包头

• 1.Event object definitions were not added for the header and payload metadata elements because they do not contain any data required to implement this scenario.
  没有针对头部和有效负荷元数据元素添加事件对象定义，因为它们不包含实现该场景所需的任何数据。
  dict.yoduao.com
• 2.The application data section contains all actual message data (payload) and any additional headers, such as the transmission header or the IMS information header.
  应用程序数据部分包含所有实际消息数据(有效负载)和任何附加头，比如传输头或IMS信息头。
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• 3.This header is meant to carry data that is not part of the payload of the actual message.
  该消息头用来传输并不属于实际消息的有效载荷部分的数据。
  dict.yoduao.com

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