The ceramostratigraphic laws are similar to those regulating archaeological stratigraphy as defined by E. C. Harris. With this approach, the links between joins are arranged in four ways according to simple rules (i.e. a is above b; b is above a; a and b are combined; a and b are unconnected). The first two cases form the basis of stratigraphy; in the third, the joins can be grouped into larger units called assemblages; these assemblages in turn define levels of contemporaneous pottery accumulations. With a sufficient amount of joins, the dated assemblages, which act as stratigraphic units, allow a finer interpretation of stratigraphies. Above all, the superimposition of the assemblages united in the different ceramostratigraphies controls the accurate basis of the chrono-typology.