I have done the following experiment and can't explain the results:
Try loading this file with batch from the jess> prompt:
(clear)
(deffacts testfacts
(wme 2)
(wme 3)
)
(reset)
(defrule r1
(wme 2)
=>
(printout t "r1 rules" crlf)
)
(defrule r2
(wme 2)
(wme 3)
=>
(printout t "r2 rules" crlf)
)
I then do the following:
Jess> (agenda)
[Activation: MAIN::r2 f-1, f-2 ; time=3 ; salience=0]
[Activation: MAIN::r1 f-1 ; time=2 ; salience=0]
For a total of 2 activations in module MAIN.
Jess> (run)
r2 rules
r1 rules
2
So far so good.
Now I start over and batch this file:
(clear)
(deffacts testfacts
(wme 1)
(wme 2)
(wme 3)
)
(reset)
(defrule r1
(wme 2)
(wme 1)
=>
(printout t "r1 rules" crlf)
)
(defrule r2
(wme 2)
(wme 1)
(wme 3)
=>
(printout t "r2 rules" crlf)
)
I then get the following result:
Jess> (agenda)
[Activation: MAIN::r2 f-2, f-1, f-3 ; time=4 ; salience=0]
[Activation: MAIN::r1 f-2, f-1 ; time=3 ; salience=0]
[Activation: MAIN::r1 f-2, f-1 ; time=3 ; salience=0]
For a total of 3 activations in module MAIN.
Jess> (run)
r2 rules
r1 rules
r1 rules
3
This I find very surprising. Can anybody tell me why I get two activation
of r1 in this case? And activations with exactly the same wmes no less!
Any light anybody can shed on this would be greatly appreciated.
Rand
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