[rules-users] Writing a rule to find a fact that has a minimum value

I want to write a rule that will select a fact that has the minimum value for an attribute. For example, find the city that has the minimum population. How would I write such a rule? David -- David R Robison Open Roads Consulting, Inc. 103 Watson Road, Chesapeake, VA 23320 phone: (757) 546-3401 e-mail: drrobison(a)openroadsconsulting.com web: http://openroadsconsulting.com blog: http://therobe.blogspot.com book: http://www.xulonpress.com/bookstore/bookdetail.php?PB_ISBN=9781597816526 This email communication (including any attachments) may contain confidential and/or privileged material intended solely for the individual or entity to which it is addressed. If you are not the intended recipient, please delete this email immediately.