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