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In the book Prolog Programming for Artificial Intelligence, a large and intricate chapter is dedicated to Expert Systems. In these systems, a knowledge-database is represented through facts and rules in a declarative manner, and then we use the PROLOG inference engine to derive statements and decisions.

I was wondering: are there any examples of expert systems that represent knowledge through a standard Relational Database approach and then extract facts through SQL queries? Is there any research in this area? If not, why is a rule-based approach preferred?

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A recent research example is the "Grind" system:

https://arxiv.org/pdf/1804.06907.pdf

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  • $\begingroup$ hi! this answer is really succint but the article is good: the references are precious. Thanks! $\endgroup$ – olinarr Jun 18 at 15:47

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