Re: [rules-users] Is "or" allowed in a rule? Can I link the rules?
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