2.1 Create facts for the entres: entre(X, Y) where X is the occasion and Y is th

Question

2.1    Create facts for the entres: entre(X, Y) where X is the occasion and Y is the entre.

         Create facts for the side: side(X, Y) where X is the occasion and Y is the side.

         Create facts for the ingredients : ingredient(X, Y) where X is the side and Y is the ingredient. [5]

2.2    Create a rule meal(X, Y) where X is the occasion and Y is the food that will be served.     For example, meal(thanksgiving, X) should return turkey, bread, and pumpkinpie.                                                                                            [5]

2.3    Create a rule shoppinglist(X, Y) where X is the occasion and Y is the ingredient needed. For example, shoppinglist(thanksgiving, X) should return egg, flour, pumpkin, and pie.                                                                                    [5]

Consider the following database that will be used to determine meals for halloween and thanksgiving with the ingredients needed for the given sides. [15 points halloween thanksgiving entree: chocolate entre: turkey sides sides bread candy sugar egg foodcoloring four soda pumpkinpie pumpkin Water pie

Explanation / Answer

2.1 A fact must start with a predicate (which is an atom) and end with a fullstop.

#1: entre(halloween,chocolate)

entre(thanksgiving,turkey)

#2: side(halloween,candy)

side(halloween,soda)

side(thanksgiving,bread)

side(thanksgiving,pumpkinpie)

#3: ingredient(candy,sugar)

ingredient(candy,foodcoloring)

ingredient(soda,water)

ingredient(soda,syrup)

ingredient(bread,egg)

ingredient(bread,floor)

ingredient(pumpkinpie,pumpkin)

ingredient(pumpkinpie,pie)

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2.2: meal(X,Y):- entre(X,Y)

meal(X,Y):- side(X,Y)

Any pair will fall in meal if either it belongs to side or entre.

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2.3: shoppinglist(X,Y):- meal(X,Z) , ingredient(Z,Y)

Description: Any pair will be valid in shopping list, if that ingredient belongs to a meal for that occasion.

Comma here denotes the logical AND operator

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