[rules-users] Tuples discrimination

Hi ! After solving the problem of Out of Memory, I come back with another question : I currently implemented rules that give me tuples like this (in the agenda, before firing rules) : M1xM2xM3xM4. But now, I want to select THE tuple that as M1xM2xM3xM4 with a property p as little as possible to execute the right hand of the rule. For sample, I have the two following tuples activated in the agenda : M'1(date = "09/25/2006") M'1(date = "09/25/2006") M'2(date = "09/26/2006") M'2(date = "09/26/2006") M'3(date = "09/29/2006") M"3(date = "09/27/2006") M'4(date = "09/31/2006") M"4(date = "09/30/2006") I would like the second tuples to be selected for executing the right hand of the rule because dates of M'2, M"3, M"4 are the closest dates compared to M'1. The problem is that I do not know on what layer this selection must be made : in the Left Hand of the rule ? Or in a AgendaFilter (selecting the better tuple to use) ? For the LH, I thought to the "accumate" CE, but I am affraid to have unreadle rules (impossible to maintain). And I don't see quite well how to implement this with "accumulate" CE (knowing that I use a DSL). For the AgendaFilter, I saw that only the current activation is accessible...so impossible to compare whith other tuples values....Moreover, I am affraid to make performance fall. Is this selection possible ? And what would be the best practice to implement it ? Regards, Eymeric.