A Tight, Practical Integration of Relations and Functions

"This text considers the notions of relations, as found in logic programming or in relational databases, and of functions, as found in functional programming or in equational languages. We study a declarative integration which is tight because it takes place right at the level of these notions, and which is still practical because it preserves the advantage of the widely used relational and functional languages PROLOG and LISP. The resulting relational and functional language, RELFUN, is used here for exemplifying all integration principles."--BOOK JACKET.