Actually, I think that laune's solution is preferable as it should be a bit more understandable. Basically the rule states If An order is not high priority And There is no item with a quantity <= 2 in that order (Meaning, all items in the order have a quantity > 2) Then Set prioiry of order to high The main difference between his rule and your rule would be that you would have to access quantity via your nested objects, while laune assumed it to be accessible directly. As for the example of forall, I never tried it with a list. Maybe I'll do it later today. I would suggest you try it the laune-way. Regards, Frank aliosha79 wrote -- View this message in context: http://drools.46999.n3.nabble.com/Loop-Drools-on-Multi-Element-tp3761638p... Sent from the Drools: User forum mailing list archive at Nabble.com.