you mean to say, if i switch the api, I ll have to rewrite all my DRL files/ the rules i have in guvnor ? Abhi -- View this message in context: http://drools.46999.n3.nabble.com/Using-Java-Rule-Engine-JSR-94-tp4023852p4023859.html Sent from the Drools: User forum mailing list archive at Nabble.com.