Are there open sorce projects on the topics "Decision Support System" and "Expert System"?

Question

Programming

It is necessary to implement a project, something in between the Decision Support System and the Expert System.
As for the theoretical part, in principle, the Internet is full of information. Even too much))
On the practical side, I would like to see how others do it, feel it. Particularly interested in the issue of storage and management of the knowledge base.

Answer 1

exist roughly like systems of algebra (Maple/Mathcad), i.e. no way
algorithms = patents = money, no one will open know-how just like that and will not give it to competitors