>1. Seems to me that the conditions in a rule are always connected with "AND" relation: True. AND is the default. >Is "or" allowed? I mean , can I express: "if (C1 or C2 or C3) and C4, then D1" in 1 rule? You can have an explicit OR, see section 6.5.2.3 of the 4.0.7 documentation. >Can I form a link of rules? Can rule A's decision (the Then part) be rule > B's condition (The When part)? > > >for instance: > >rule A: if C1, C2, C3 then D1 > >rule B: if D1, C4 then D2 > usually the consequence (RHS) of would modify facts which you can test in rule B. A common way is to assert a fact. >When the complexity increases, the number of rules explodes. What's your definition of "explodes"? This suggest that you should have another go at your rule/fact model. Cheers, --Ingomar Am 24.07.2008 um 17:25 schrieb Yu Wang: I'm a beginner user of Jboss, please bear with my maybe dumb questions: > > 1. Seems to me that the conditions in a rule are always connected with > "AND" relation: > > such as the following rule > > if C1 > C2 > C3 > then D1 > > it means "if C1 and C2 and C3, then D1" > > Is "or" allowed? I mean , can I express: "if (C1 or C2 or C3) and C4, > then D1" in 1 rule? > > Right now, I can only use 3 rules to express it: > > if C1 > C4 > then D1 > > if C2 > C4 > then D1 > > if C3 > C4 > then D1 > > > 2. Can I form a link of rules? Can rule A's decision (the Then part) be > rule B's condition (The When part)? > > for instance: > rule A: if C1, C2, C3 then D1 > rule B: if D1, C4 then D2 > > > When the complexity increases, the number of rules explodes. > I browsed the document and didn't find a clue. I'm using the 4.0.7. > Your help is highly appreciated. > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users