Introductions to Prolog seem to suffer the "draw the rest of the fucking owl" problem. There's a huge gap from the introductory examples to building real projec

Introductions to Prolog seem to suffer the "draw the rest of the fucking owl" problem. There's a huge gap from the introductory examples to building real projects. What I would love to see more of is how to embed a prolog interpreter into a wider program, using the source program's data as the database, then prolog (or perhaps datalog) as an advanced query engine or rules engine.