clips - CLIPS LHS 匹配多槽

Question

我为专家系统编写了这条规则：

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

但是，我不希望栖息地的价值与我给出的所有价值相匹配，而只与至少一个价值相匹配。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"))
)

但我想知道是否有更好的解决方案。谢谢

Answer 1

如果 value 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 value 是一个多字段插槽，请这样做：

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