Hello, It seems that is not possible to make rules with operators like "collect" that affects the rule to a set of objects.
It is possible to simulate that behaviour of collect in some form? I need to fire rules that have conditions over a set of objects (of same type) but i don't know how to group conditions over multiple same objects. For example : rule CarsStopped when $c:Car (stop = true) // here i need a collect, i want multiple objects in one rule that then print("The list of cars stoped is:$c); end It seems that "collect" doesnt exist. It is possible to simulate that ? Actually i ame using JRules and want to use drools too, but i am having dificulties to do what i can do with JRules. Thank you very much for your responses.