“…MAP is the parametric algebraic specification of finite maps (for a complete definition, see, e.g., [14]). Given two algebraic specifications A and B with main sorts a and b, respectively, ¥\JNC1{A,B) indicates the specification, with sort funct{fl,d), of the functions from elements of sort a into elements of sort h; FUNCT{^,B) has the operators Fl, F2, F3 introduced in the previous section (see [8,21]). …”