Hi, l looked around the mailing list and couldn't find a comparable problem to mine.
I'm trying to fire a rule when:
1) I have indication facts for all the links of a system
2) The indications should have the same timestamp
3) the returned ?dvalue should be the maximum for all the indication facts with the same timestamp
With the following facts:
(assert (indication (link "LINK001") (timestamp 20) (value 22)))
(assert (indication (link "LINK002") (timestamp 20) (value 20)))
(assert (indication (link "LINK003") (timestamp 20) (value 18)))
(assert (system (name "retail") (links (create$ "LINK001" "LINK002" "LINK003"))))
I got this far and now I'm stuck:
(defrule max
"Calculate the maximum value"
(system (name ?pname) (links $?links))
(indication (link ?dlink) (value ?dvalue) (timestamp ?dtimestamp))
(test (member$ ?dlink ?links))
=>
(printout t "Found pair " ?pname " for link " ?dlink " with datalag " ?dvalue crlf)
)
This only makes sure that the indications have matching system, but not the same one.
I know this will match the indication 3 times. I'm not sure how to write the pattern to make sure we have an indication for all the links for a system with the same timestamp.
I want this to fire off and give me a value of 22.
Any help is appreciated.
+ - + - + - + - + - + - + - + - + - + - + - + - + - + - +
hitesh lad
