[rules-users] Nested Collect probably

I have a class Employee (name) Certificates (course, year, employee) If the employees have CCNA & CCNP from the “same” year and then if they took “CCIE or J5SE in 2000” or “J4WS in 2001 or 2002, or 2003” The Action should be taken if there are more than 5 such employees. The connection between Employee and Certificates is through Certificates.employee, but I can change it to a list of certificates in Employee also if needed. I start with $e: Employee() Certificate (employee == $e, course == “CCNA”, $ccnaYear : year) Certificate (employee == $e, course == “CCNP”, $ccnpYear : year) //this will get the years for one employee.. //now we need to get all other employees from same year.. //but we still need to make sure all certificates are from the same employee. ArrayList( size >= 2 ) from collect(Certificate ( ((course == “CCNA”, year == $ccnaYear, $e_this:employee) && (course == “CCNP”, year == $ccnpYear, employee == $e_this)) && ( ((course == “CCIE”, year == 2000, employee == $e_this) || (course == J5SE”, year == 2000, employee == $e_this)) || ((course == “J4WS”, year == 2001, employee == $e_this) || (course == “J4WS”, year == 2002, employee == $e_this) || (course == “J4WS”, year == 2003, employee == $e_this)) ) ) This is going crazy at this stage. First problem, - I start with one employee, and try to get his years of CCNA and CCNP Next I am collecting Certificates instead of Employees which I should be collecting and checking the length of the employees. I think something like this will help me http://blog.athico.com/2007/06/chained-from-accumulate-collect.html But I am unable to convert it into my usecase. Please help. Thanks -- View this message in context: http://drools.46999.n3.nabble.com/Nested-Collect-probably-tp4029681.html Sent from the Drools: User forum mailing list archive at Nabble.com.