Documentum RPS conditional aging, event date is not populated

bharath_ot1

I am working on Documentum RPS and I am very new to the concept, My doubt is on the conditional aging.

So we create the conditions and apply them to the retention policy in phase tab, but there is no place to determine or configure what the condition needs to look for like a change in date or something, Let say we have 100 records split in two different folders and have the same object type but i want to hold one for 7 years and another one for 10 years, from two different date field, I cannot go to chronological since it has one to one mapping with the base date to object type, so i created two policies with two different conditions, but unless the event date is filled, i will not be able to even see the content in the Qualification manager, how to configure the conditions to look for the date and populate the event automatically instead of manually going into the applied retention retainer to update the event date.

Any help would be really appreciated.