CLIPS LHS 匹配多时隙

Question

我为专家系统写了这条规则：

    (defrule wild chicory
      (attribute (name habitat) (value sea montain grassland unknown))   
=>
      (assert (plant "Cichorium_Intybus"))
    )

但是我不希望栖息地的值与我给出的所有值相匹配，而是只与至少一个值相匹配。我想知道我应该怎么做。我可以这样做：

(defrule wild chicory
          (or (attribute (name habitat) (value sea)) 
              (attribute (name habitat) (value mountain))
              (attribute (name habitat) (value grassland))
              (attribute (name habitat) (value unknow))
          )
          =>
          (assert (plant "Cichorium_Intybus"))
)

但是我想知道有没有更好的解决办法。谢谢

Answer 1

如果值是单个字段槽，请这样做：

(defrule wild chicory
  (attribute (name habitat) (value sea | mountain | grassland | unknown)) 
  =>
  (assert (plant "Cichorium_Intybus")))

如果值是一个多字段槽，这样做：

(defrule wild chicory
  (attribute (name habitat) (value $? sea | mountain | grassland | unknown $?)) 
  =>
  (assert (plant "Cichorium_Intybus")))

CLIPS LHS 匹配多时隙

CLIPS LHS match multislot

clips

expert-system

inference-engine