Are the two conditions constraints inside the same pattern or two different patterns? In the former case, DeMorgan's laws also apply:
( a != "x") || ( b != "y" ) and you should anyway be able to use free-form boolean expressions inside a pattern, provided that you use one of the latest versions. Otherwise (two patterns), see the previous posts. Best, Davide -- View this message in context: http://drools.46999.n3.nabble.com/not-operation-available-in-drools-tp4017936p4017939.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
