Re: JESS: Subrule generation and the 'or'

[Dheeraj Kakar]

Thanks for the prompt reply. The example I showed you was a small piece of what is a fairly elaborate LHS. What the RHS does can be looked at as incrementing a counter. Has anyone ran into something like this? Any ideas?

Thanks very much


[EMAIL PROTECTED] wrote:

I think Dheeraj Kakar wrote:
  

Hello Jess users,

Quoting from the manual:

" A rule containing an 'or' conditional element with n branches is 
precisely equivalent to n rules, each of which has one branch as its 
left hand side. In fact, this is how the or conditional element is 
implemented: Jess internally generates one new rule for each branch."

If both branches of an OR are matched, does it lead to multiple 
activations? 
    

Yes. If this isn't what you ant, then if the right-hand-side takes
some measurable action, then you can add a negated pattern to the
left-hand-side to detect whether this has occurred yet; i.e.,

(defrule foo (or (a) (b)) (not (c)) => (assert (c)))




---------------------------------------------------------
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

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