[rules-users] how to create local variable

Folks, I have a rule where I am repeating part of it twice : ($cs.getSuppCode().substring(4, 6)), and I would like to replace it with variable... how can I do that? The solution with "in" doesn't worl because it is a java code needed to perform calculations for variable..... Please see the rule below: rule "SupplierView: Headquarter Supplier Code should end on 25 or 30." when $cs : SupplierView(corporate == true) eval($cs.getSuppCode().substring(4, 6) == "25" || $cs.getSuppCode().substring(4, 6) == "30") then ValidationErrorFacade.getInstance().registerError($cs, new ValidationError("Headquarter Supplier Code should end on 25 or 30.")); end Thanks, -Sergey ********************** ** LEGAL DISCLAIMER ** ********************** This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this E-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this E-mail message from your computer.