Skip to content

Risto-Stevcev/aclp

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

4 Commits
 
 
 
 
 
 
 
 
 
 

Repository files navigation

ACLP

Abductive Constraint Logic Programming

A single-file abduction system for prolog. Doesn't need/use CHR for abduction.

Examples

Tested with SWI, Trealla, Scryer, and Tau:

?- [alp_int].
Warning: singleton: RestOfLiterals, near alp_int:160
Warning: singleton: RestOfLiterals, near alp_int:169
Warning: singleton: Y, near alp_int:177
Warning: singleton: Z, near alp_int:178
   true.
?- [alp_prof_ex].
   true.
?- demo([professor(henning)], [], FinalExp).
   FinalExp = [not(rich(henning)),professor(henning)]
;  false.
?- demo([happy(henning)], [], FinalExp).
   FinalExp = [not(professor(henning)),rich(henning)]
;  FinalExp = [has(henning,nice_students),not(rich(henning)),professor(henning)]
;  false.

See more examples in alp_exp.pl.

Notes

  • Integrity constraints (ic) tell the abductive system what can't be true. For example, in alp_prof_ex, you can't have a rich professor.
  • Abducibles tell the abductive system how to think about facts that it's seeing for the first time (open world). For example, in EX3 of alp_exp, if you ask about a new bird that isn't tweety or sam, then the system will say that this new bird is either slim or bird_ab. Abducibles represent default logic.

References

About

Mirror/port of ACLP for prolog

Resources

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published

Languages