Hi everyone. I have a BaseProduct with paymentMode as a property BaseProduct is assigned to a Customer Customer creates a uProduct. uProduct is a customized product created by the customer. It contains multiple BaseProducts. for eg Music is a Baseproduct with Wire paymentMode Picture is a product with CreditCard paymentMode Movie is a product with DebitCard paymentMode iPod is a uProduct which contains Music and Pictures implies that it supports Wire and CreditCard iPad is a uProduct with contains Music, Movies and Pictures implies that it supports all paymentModes rule "Non Mandatory" // calculates all non mandatory fields for display when $transaction : Transaction($paymentModes :uProduct.baseProduct) // select all the paymentModes supported by the uProduct $displayMode : Property(payMode in $paymentModes) // select a property which has a valid paymentMode ... someOther conditions .... then ... in the above rule $paymentModes returns arrayList of baseProducts. But I want to access the list of paymentModes. ie, when Transaction has iPod $paymentMode should return [wire,CreditCard], when Transaction has iPad it should return [wire,CreditCard,DebitCard] Question : How do I access array of a selected property which are again part of Array of an object ? Any suggestion ? Thanks a lot. -- View this message in context: http://drools.46999.n3.nabble.com/how-to-eval-with-property-inside-a-nest... Sent from the Drools: User forum mailing list archive at Nabble.com.