Just to amplify what Ernest said below, let's assume that you are checking to see if something does not exist. For example, we are asking if there are NO red sports cars in the lot that have a 300hp or greater motor. If there are no red sports cars like that, does the car have a radio? Or, if there are no red sports cars like that, what is the hp of the motor? Either question is nonsense since there are not red sports cars to check. :-)
SDG jco James C. Owen Senior Knowledgebase Consultant 6314 Kelly Circle Garland, TX 75044 972.530.2895 214.684.5272 (cell) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, June 17, 2003 10:40 AM To: [EMAIL PROTECTED] Subject: Re: JESS: not CE I think Maxim Tretyak wrote: > Hi > > 1. This is rather suggestion. I am frequently use fact ID as a slot value to > refer to fact (looks like foreign key). But in cases when there is need to > check an absence of referred fact I can't do this in LHS due to a "not" CE > incapacity to binding to a variable. So I'd like to have this opportunity. > When a pattern has a pattern binding, it is a fact that matches the pattern that is bound to the variable. In the scenario you're describing, what would the variable be bound -to-? > 2. Why after retracting the (a) a test rule have not turn to agenda? > Sorry, I don't have access to a copy of Jess to test this today; I'll get to it later this week. --------------------------------------------------------- Ernest Friedman-Hill Distributed Systems Research Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 PO Box 969, MS 9012 [EMAIL PROTECTED] Livermore, CA 94550 http://herzberg.ca.sandia.gov -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] -------------------------------------------------------------------- -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
