Beispiel Animals3

Jan Burse, erstellt 22. Okt 2018
/**
* Animals expert system via forward chaining.
*
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*/
:- use_module(library(minimal/delta)).
:- multifile motion/1,skin/1,diet/1.
:- thread_local motion/1,skin/1,class/1,diet/1,animal/1.
post(class(mamal)) <=
posted(motion(walk)),
posted(skin(fur)).
post(class(fish)) <=
posted(motion(swim)),
posted(skin(scale)).
post(class(bird)) <=
posted(skin(feather)).
post(animal(rodent)) <=
posted(class(mamal)),
posted(diet(plant)).
post(animal(cat)) <=
posted(class(mamal)),
posted(diet(meat)).
post(animal(salmon)) <=
posted(class(fish)),
posted(diet(meat)).
post(animal(eagle)) <=
posted(class(bird)),
posted(diet(meat)).
write('The animal is '),
% ?- use_module(library(minimal/delta)).
% % 0 consults and 0 unloads in 0 ms.
% Yes
% ?- post(motion(walk)), post(skin(fur)).
% Yes
% ?- post(motion(walk)), post(skin(fur)), post(diet(meat)).
% The animal is cat
% Yes
% ?- post(motion(walk)), post(skin(fur)), post(diet(plant)).
% The animal is rodent
% Yes

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