Hello Jess Users,
I'm new to JESS and playing with templates and rules. I'm trying to
create a
rule that performs and 'or' on two facts:
; Fact Templates
(deftemplate gross "gross product"
(slot value (type INTEGER))
)
(deftemplate cost "cost product"
(slot value (type INTEGER))
)
;Complex Alerts Alerts of Alerts
(defrule Example_OR_Alert
(or (gross (value ?x))
(cost (value ?y)))
=>
; (send-alert 46 2 2)
(printout t "Complex_Alert 100 " crlf)
)
JESS does not accept my rule definition. I receive the following error
message:
Jess reported an error in routine Jesp.parsePattern while executing
(batch "templates1.txt").
Message: Bad slot value .
Program text: ( defrule Example_OR_Alert ( or ( at line 12.
jess.Value jess.Jesp.parseSexp()
jess.Value jess.Jesp.parse(boolean)
void jess.Main.execute(boolean)
void jess.ConsoleApplet.run()
void java.lang.Thread.run()
If someone could please help me with my rule definition using the 'or'
function, I would greatly appreciate it.
Thank you,
mike
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