'What is the relation between Seq2Seq and Prompt Learning?

As far as I know, the Seq2Seq Framework is to take a sequence of items and output another sequence. Prompt Learning is to provide a "prompt" and ask the pre-trained model to make predictions. It seems that Prompt Learning is also a kind of Seq2Seq methods.

What is the difference between these two methods as they seem to be quite similar?



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