[rules-users] Variable length sliding windows?

I'm evaluating the use of Drools Fusion for a new project and have a question about sliding windows that wasn't clear from the documentation. Does the time specification in a sliding window need to be hardcoded in the rule, or can it be derived from something else? Basically, I'm wondering whether I can write a rule that looks something like when ... Window ($win : length) Number (intValue > $someValue) from accumulate ( Sample($len: length, value > $someThreashold) over window:time ($win), sum($len) ) then ... end I know window:time() supports constant values like "10m", but can the window be driven from one of the other facts in the LHS picked up by the LHS of the rule? Will Lauer CA Technologies Sr Software Architect Tel: +1-713-625-9410 Cell: +1-979-820-2210 Will.Lauer(a)ca.com