Edson, Thanks much, but regrettably I'm a 3.0.6 user for now. Can you offer any tips for that version? (Sorry to be backward looking-- I'll upgrade!) Thanks, Rick >Assuming you are using 4.0, just bind one and compare to the other: > >rule XXX >when > Tree( $new : newNumberLeaves, oldNumberLeaves > $new ) >then > // do something >end ************************************************************************* The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please resend this communication to the sender and delete the original message or any copy of it from your computer system. Thank you. ************************************************************************* _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users