Abundance trends with ranks. Left panel: Sr abundances versus their corresponding ranks up to the regime where the PCCs and SCCs indicate only low correlations, i.e., including complete r-process stars of regime 3. We see the start of deviations from a linear behavior already at limited-r stars (HD 122563). Right panel: Zr abundances versus their corresponding ranks similar as for Sr. The deviation from a linear behavior starts later at the r-II stars (CS22829−052 and CS31082−001).