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yap-6.3/packages/CLPBN/examples/School/schema.yap
2011-05-01 22:49:34 +01:00

72 lines
1.7 KiB
Prolog

/* base file for school database. Supposed to be called from school_*.yap */
professor_key(Key) :-
professor(Key).
professor_ability(Key,Abi) :-
abi_table(Key, AbiDist),
{ Abi = ability(Key) with p([h,m,l], AbiDist) }.
professor_popularity(Key, Pop) :-
professor_ability(Key, Abi),
pop_table(Key,PopTable),
{ Pop = popularity(Key) with
p([h,m,l], PopTable,[Abi]) }.
registration_key(Key) :-
registration(Key, _, _).
registration_course(Key, CKey) :-
registration(Key, CKey, _).
registration_student(Key, SKey) :-
registration(Key, _, SKey).
registration_grade(Key, Grade) :-
registration(Key, CKey, SKey),
course_difficulty(CKey, Dif),
student_intelligence(SKey, Int),
grade_table(Int, Dif, Table),
{ Grade = grade(Key) with Table }.
% registration_satisfaction(r0, h) :- {}.
registration_satisfaction(Key, Sat) :-
registration_course(Key, CKey),
course_professor(CKey, PKey),
professor_ability(PKey, Abi),
registration_grade(Key, Grade),
satisfaction_table(Abi, Grade, Table),
{ Sat = satisfaction(Key) with Table }.
course_key(Key) :-
course(Key,_).
course_professor(Key, PKey) :-
course(Key, PKey).
course_rating(CKey, Rat) :-
setof(Sat, RKey^(registration_course(RKey,CKey), registration_satisfaction(RKey,Sat)), Sats),
{ Rat = rating(CKey) with avg([h,m,l],Sats) }.
course_difficulty(Key, Dif) :-
dif_table(Key, Dist),
{ Dif = difficulty(Key) with p([h,m,l], Dist) }.
student_key(Key) :-
student(Key).
student_intelligence(Key, Int) :-
int_table(Key, IDist, Domain),
{ Int = intelligence(Key) with p(Domain, IDist) }.
student_ranking(Key, Rank) :-
setof(Grade, CKey^(registration_student(CKey,Key),
registration_grade(CKey, Grade)), Grades),
{ Rank = ranking(Key) with avg([a,b,c,d],Grades) }.
:- ensure_loaded(tables).