Hi, I may have missed it in the 5.5.0.Final Drools Expert User Guide, please point it out if its actually in the document. What is the use of "->" on the LHS? Thank you -- View this message in context: http://drools.46999.n3.nabble.com/What-is-tp4024549.html Sent from the Drools: User forum mailing list archive at Nabble.com.