red bayesiana bidimensional mercado 1 industrias 1 a 3, Prolog

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objeto :- write('{'), read(X), (X='atributo'->atributo;
                                write('')), write('}').
atributo:- cadena, write(':'), valor,a1.
a1 :- read(X), (X='atributo'->write(','),atributo;
                    X='fin'->write('')).
valor :- read(X), (X='numero'->numero;
                    X='cadena'->cadena;
                    X='metodo'->metodo;
                    X='arreglo'->arreglo;
                    X='objeto'->objeto).
metodo:- write('"function() {'),instruccion,write('return a;}"').

arreglo:- read(X),write('['),(X='elemento'->elemento; 
                                write('')),write(']').  
elemento:- valor,ai.
ai:- read(X),(X='elemento'-> write(','),elemento;
             X='fin'->write('')).

instruccion:- read(X), (X='asignacion'->asignacion;
                    X='decision'->decision;
                    X='fin'->write('')).
decision:- write('if ('),read(X),write(X),write(')'),verdadero.
verdadero:- write('{'),instruccion,write('}').
asignacion:- read(X),write(X),write('='),read(Y),write(Y),write(';'),instruccion.                    
cadena:- write('"'),read(X),write(X),write('"').
numero:- read(X),write(X).
:- objeto.

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