after selects those values for an attribute after some identified position. For example, given the following case fragment,

                13 Feb 03   03 Oct 03   16 Nov 03	20 Dec 03
ABC                2.5        3.2*        2.9        2.7
DEF                6.3        1.9         3.4        2.6

at least 1 ABC after max ABC is normal

no ABC after min DEF is high