Message payload and message meta data.
消息有效载荷与消息元数据。
When a message is received, the queue name and message format (MQMD.Format) is matched to attributes in the meta-object.
当接收到消息时，队列名和消息格式（MQMD.Format）与元对象中的属性进行比较。
The HEAD request returns no HTTP message body but rather the request file's meta-information (size, etc.).
HEAD请求会返回空的HTTP消息体，但是会返回所请求文件的元数据信息(如，大小等)。
In addition, they assume that both the sender and the receiver have full knowledge of the message context and do not encode any meta-information such as the names or types of the arguments.
除此之外，他们假设发送端和接收端充分了解消息的前后关系，因此对诸如参数名称或类型的任何元信息都不编码。
In addition, they assume that both the sender and the receiver have full knowledge of the message context and do not encode any meta-information such as the names or types of the arguments.
除此之外，他们假设发送端和接收端充分了解消息的前后关系，因此对诸如参数名称或类型的任何元信息都不编码。
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