Re: [rules-users] Extracting management information from the content of the rules

$p : Product( color == "red", country == "Italy", wt > 10 ) then $p.setPrice( wt * 2.75 ) end

$p : Product( color == "red", country == "Italy", wt > 20 ) then $p.setPrice( wt * 2.00 ) end

Out of curiosity, I'd like to better understand the requirements. Are we talking about rules of the form: when Product( color == "red", country == "Italy", discount > 10 ) then ... end i.e., the discount is stored in some field and constrained by the rules? or when $p : Product( color == "red", country == "Italy", $x : price ) then $p.setPrice( $x * 0.75 ) end More properly, the questions are : 1) is the discount given or computed? 2) is it available (or can be stored) in some data field or is it "transient" ? The RHS of a rule is a sort of "black box" which is more difficult to reason against, so you'll probably need some kind of reified discount: when $p : Product( color == "red", country == "Italy" ) then insertLogical( new Discount( $p, 0.75 ) ); end ----------------------------------------------------------------------------------------------------------------- This said, there is a final, more important question. Are you interested in a report describing the characteristics of the objects which were discounted? For example, you have 1000 discounted products in your system and you want to find a "POSTERIOR" correlation between their features and the discount they got. This is the kind of problems that are solved by data mining techniques, e.g. CARTs (classification and regression trees), Association Rules (not the rules we're used to !!) or Clustering algorithms If instead you want to reason abstractly, using the definitions contained in the rules' LHSs to understand which classes of objects COULD receive some kind of discount, that's a kind of "semantic" problem and I guess that some tableau-like technique could help. This to say that, according to the exact type of "reporting" that you want to build, the "rules" you'd have to write might vary quite a lot. Best Davide -- View this message in context: http://drools.46999.n3.nabble.com/Re-rules-users-Extracting-management-in... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users