Hello, Thanks a lot for helping me!
It is working if there are only 2 facts in the working memory. If there are more than 2 facts, the rules will be fired several times. Is there a way to make sure that o1 is associated to fact 1 and o2 is linked to fact 2? Following does not fire any rule: ?o1 <- (fact-id 1) (S ?s1)) ?o2 <- (fact-id 2)(S ?s2)) (test (> ?s1 ?s2))) => ... Thanks a lot! Andrew Ernest Friedman-Hill wrote: > > If I understand you correctly, the assertion order matters here; > i.e., your "fact 1" is the first one asserted, and "fact 2" is the > second. The order in which facts are asserted is normally not a > concern, but Jess does track it, and you can make a rule conditional > on it; you might do something like this. Let's call the object type > "O" and the slot "S": > > (defrule rule-1 > ?o1 <- (O (S ?s1)) > ?o2 <- (O (S ?s2)) > (test (and (> ?o2 ?o1) (> ?s1 ?s2))) > => ... > > Comparing ?o1 and ?o2 here assures that the object with the higher > fact index (i.e., the one that was asserted later) is the one with > the lower value in S. > > > On Oct 1, 2007, at 11:01 PM, ameng wrote: > >> >> Hello, >> From java program, I added a couple of shadow facts of same object >> type into >> working memory in particular order. When defining a rule, how I can >> do thing >> like: >> >> value of slot 1 in fact1 > value of slot 1 in fact 2 >> => >> doing something >> > > --------------------------------------------------------- > Ernest Friedman-Hill > Informatics & Decision Sciences Phone: (925) 294-2154 > Sandia National Labs FAX: (925) 294-2234 > PO Box 969, MS 9012 [EMAIL PROTECTED] > Livermore, CA 94550 http://www.jessrules.com > > -------------------------------------------------------------------- > 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] > -------------------------------------------------------------------- > > > -- View this message in context: http://www.nabble.com/How-to-access-slot-value-of-several-shadow-facts-of-same-type.-tf4552571.html#a13008274 Sent from the Jess mailing list archive at Nabble.com. -------------------------------------------------------------------- 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] --------------------------------------------------------------------
