如何做逻辑或CLIPS? [英] How to do a logical or in CLIPS?

问题描述

更新的代码: 在何处添加?f<-(practice-is-on-off OFF)

Updated code: where to add the check for ?f<-(practice-is-on-off OFF)

 (defrule no-practice "Rules for when practice cannot be held"

        (or ?f <- (practice (number-of-paddlers ?p&:(< ?p 6)))
            ?f <- (practice (number-of-coaches ?c&:(< ?c 1))))

        =>
        (modify ?f (practice-is-on-off OFF)))

    ;end

---

我正在CLIPS中定义模板，并且正在使用逻辑运算符OR. 但是，当我加载模板时，它会抛出一个错误

---

I am defining a template in CLIPS and I am using logical operator OR. However, when I load the template, it is throwing an error saying

[TMPLTDEF1] Invalid slot or not defined in corresponding deftemplate practice.

ERROR:
(defrule MAIN::no-practice "Rules for when practice cannot be held"
   ?f <- (practice (or

这是我所拥有的: 预先感谢您的任何见解.谢谢

Here's what I have: Thanks in advance for any insight. Thanks

(deftemplate practice "structure of a practice"

    (slot number-of-paddlers (type NUMBER))
    (slot number-of-coaches (type NUMBER))
    (slot practice-is-on-off (type SYMBOL) (default ON))
    (slot practice-id (type NUMBER))

)


(defrule no-practice "Rules for when practice cannot be held"
    ?f <- (practice 
    (or
            (number-of-paddlers
                ?v_number-of-paddlers&:(
                    < ?v_number-of-paddlers 6))

            (number-of-coaches
                ?v_number-of-coaches&:(
                    < ?v_number-of-coaches 1))

    )
    )

    =>
        (modify ?f (practice-is-on-off OFF)
        )
)

推荐答案

该错误告诉您您正在尝试匹配practice deftemplate中名为或"的插槽，并且该插槽不存在.这是"no-practice"规则的两个替代版本，可以完成您尝试做的事情.

The error is telling you that you are attempting to match a slot named "or" in the practice deftemplate and that slot does not exist. Here are two alternate versions of the "no-practice" rule that will accomplish what you are trying to do.:

版本1:

(defrule no-practice "Rules for when practice cannot be held"
    (or ?f <- (practice (practice-is-on-off ON)
                        (number-of-paddlers ?p&:(< ?p 6)))
        ?f <- (practice (practice-is-on-off ON)
                        (number-of-coaches ?c&:(< ?c 6))))
    =>
    (modify ?f (practice-is-on-off OFF)))

请注意，除非您还检查CE中的practice-is-on-off是否为"ON"，否则上述规则可能会为practice触发两次.

Note that the rule above may fire twice for a practice unless you also check that practice-is-on-off is "ON" in the CE's.

版本2:

(defrule no-practice "Rules for when practice cannot be held"
    ?f <- (practice (practice-is-on-off ON)
                    (number-of-paddlers ?p) (number-of-coaches ?c))
    (test (or (< ?p 6) (< ?c 6)))
    =>
    (modify ?f (practice-is-on-off OFF)))

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