fove initial skeleton.w

packages/CLPBN/examples/School/parschema.yap

@@ -0,0 +1,66 @@
+
+:- use_module(library(pfl)).
+
+/* base file for school database. Supposed to be called from school_*.yap */
+
+%
+% bayes is a parfactor for a bayesian network,
+% first argument is target of other arguments pop(K) <- abi(K)
+% second argument is the name of a predicate to call for \phi (CPT)
+% last argument is a list of goals defining the constraints over the elements
+% of the 
+%
+
+%
+% these states that skolem variables abi(K) are in a parametric factor with
+% with \phi defined by abi_table(X) and whose domain and constraints
+% is obtained from professor/1.
+%
+bayes abi(K)::[h,m,l] ; abi_table ; [professor(K)].
+
+bayes pop(K)::[h,m,l], abi(K) ; pop_table ; [professor(K)].
+
+bayes grade(C,S)::[a,b,c,d], int(S), diff(C) ; grade_table ; [registration(_,C,S)].
+
+bayes sat(C,S,P)::[h,m,l], abi(P), grade(C,S) ; sat_table ; [reg_sat(C,S,P)].
+
+bayes rat(C) :: [h,m,l], avg(Sats) ; avg ; [course_rating(C, Sats)].
+
+bayes diff(C) :: [h,m,l] ; diff_table ; [course(C,_)].
+
+bayes int(S) :: [h,m,l] ; int_table ; [student(S)].
+
+bayes rank(S) :: [a,b,c,d], avg(Grades) ; avg ; [student_ranking(S,Grades)].
+
+
+grade(Key, Grade) :-
+	registration(Key, CKey, SKey),
+	grade(CKey, SKey, Grade).
+
+reg_sat(CKey, SKey, PKey) :-
+	registration(_Key, CKey, SKey),
+	course(CKey, PKey).
+
+course_rating(CKey, Sats) :-
+	course(CKey,  _),
+	setof(sat(CKey,SKey,PKey),
+	   reg_sat(CKey, SKey, PKey),
+          Sats).
+
+student_ranking(SKey, Grades) :-
+	student(SKey),
+	setof(grade(CKey,SKey), RKey^registration(RKey,CKey,SKey), Grades).
+
+:- ensure_loaded(tables).
+
+%
+% evidence
+%
+abi(p0, h).
+
+pop(p1, m).
+pop(p2, h).
+
+% Query
+% ?- abi(p0, X).
+