A rule is named floor if all of its atoms (head and overall body) are floor. A ground rule R1 is usually a floor instance of A different rule R2 if R1 is the result of a substitution of constants for all the variables in R2. The Herbrand base of https://marcoezrhx.bloggactivo.com/33349276/the-fact-about-datalog-that-no-one-is-suggesting