AN UNBIASED VIEW OF DATALOG

conjunctive queries extended by union and negation, which by Codd's theorem correspond to relational algebra and very first-order logicDatalog is actually a declarative logic programming language. While it truly is syntactically a subset of Prolog, Datalog usually makes use of a bottom-up in lieu of best-down analysis model.Furthermore, using an IM

A rule known as ground if all of its atoms (head and human body) are floor. A floor rule R1 is actually a floor occasion of One more rule R2 if R1 is the result of a substitution of constants for the many variables in R2. The Herbrand base of a Datalog application is the list of all ground atoms which can be manufactured Along with the constants ap