It is a system that systematizes the knowledge of experts and guides non-experts to make the same judgments as experts. We will listen to the if - then rule of "in this case, do this" from an expert, and create a system that guides you along that rule.
Originally, an expert system was created by human beings who collected the knowledge of experts and made it into a form that could be used.
With the development of natural language processing, there is a type in which Artificial Intelligence (AI) does the learning of knowledge.
Pattern as Hints