Hi In the JBoss Rules 5.0 dev guide I read the statement: When comparing inline eval with standard eval, we can see that they both must return true or false. However, inline eval must be a time-constant expression. It is evaluated only once and then it is cached by Drools 1. Can I assume that the caching lasts until the session is disposed of? 2. Is there a difference between the conditions Fact( eval(isValid) ) and Fact( isValid == true ) or are they evaluated in the same way? -Evert -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/inline-eval-vs-compar... Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users