Is it possible to have a rule that creates something similar to a SQL join. For example, the working memory has the following: List<Fact_A> and List<Fact_B>. In the "if" of the drl rule we want to check if Fact_A.someAttribute (some_condition) Fact_B.someOtherAttribute //some_condition could be .equals(), .startsWith(), notEquals() ... then //somehow Fact_A and Fact_B Any examples or pointers would be greatly appreciated. Thanks. -- View this message in context: http://drools.46999.n3.nabble.com/Is-it-possible-to-implement-something-s... 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