Hello, I see the example mvel "in" operator for the inline array as follows: surgeryCode in [00, 12, 13, 15, 19, *20, 21, 22, 23, 24, 25*, 30, 33, 45, 48, 55, 56, 65, 66, 70, 80, 90, 99] If you notice above the codes *21 to 25* are contiguous (Range) Is it possible to specify in the list a 'short hand' notation like 21-25 like as follows: surgeryCode in [00, 12, 13, 15, 19, 20, *21-25*, 30, 33, 45, 48, 55, 56, 65, 66, 70, 80, 90, 99] If Drools does not support it, is writing my own Custom Operator is my only option? Thanks in advance! Matt'M -- View this message in context: http://drools.46999.n3.nabble.com/Mvel-in-operator-and-Inline-List-Questi... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users