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with Generic_Expression;
with Generic_Fact_Base;
with Generic_Rule_Base;
with Generic_Predicate;  
with Slot;
generic

    Max_Slots                      : Positive := 20;
    Max_Condition_Elements_By_Rule : Positive := 10;  
    Max_Condition_Elements         : Positive := 200;
    Max_Rules                      : Positive := 50;

    type Class_Names is (<>);
    Null_Class_Name : Class_Names := Class_Names'Last;

    type User_Defined_Expression_Operators is (<>);

    with function User_Defined_Unary_Evaluate
                     (Using_Operator : User_Defined_Expression_Operators;
                      Right          : Slot.Object) return Slot.Object is <>;

    with function User_Defined_Binary_Evaluate
                     (Using_Operator : User_Defined_Expression_Operators;
                      Left, Right    : Slot.Object) return Slot.Object is <>;

    with function User_Defined_Image
                     (Op : User_Defined_Expression_Operators) return String is
       User_Defined_Expression_Operators'Image;

    type User_Defined_Predicate_Operators is (<>);

    with function User_Defined_Unary_Match
                     (Using_Operator : User_Defined_Predicate_Operators;
                      Value          : Slot.Object) return Boolean is <>;

    with function User_Defined_Binary_Match
                     (Using_Operator : User_Defined_Predicate_Operators;
                      Value          : Slot.Object;
                      Against        : Slot.Object) return Boolean is <>;

    with function User_Defined_Image
                     (Op : User_Defined_Predicate_Operators) return String is
       User_Defined_Predicate_Operators'Image;

    type Rule_Bundles is (<>);

package Generic_Kbs is

    package Expression is  
       new Generic_Expression
              (User_Defined_Operators => User_Defined_Expression_Operators,
               User_Defined_Unary_Evaluate => User_Defined_Unary_Evaluate,
               User_Defined_Binary_Evaluate => User_Defined_Binary_Evaluate,
               User_Defined_Image => User_Defined_Image);

    package Predicate is new Generic_Predicate
                                (User_Defined_Operators =>
                                    User_Defined_Predicate_Operators,
                                 User_Defined_Unary_Match  
                                     => User_Defined_Unary_Match,
                                 User_Defined_Binary_Match  
                                     => User_Defined_Binary_Match,
                                 User_Defined_Image     => User_Defined_Image,
                                 Expression_Object      => Expression.Object,
                                 Slot_Object_Expression => Expression.Value,
                                 Alias_Expression       => Expression.Value,
                                 Evaluate               => Expression.Evaluate,
                                 Put                    => Expression.Put);

    package Fact_Base is  
       new Generic_Fact_Base (Class_Names => Class_Names,
                              Null_Class_Name => Class_Names'Last,
                              Max_Slots => Max_Slots,
                              Predicate_Object => Predicate.Object,
                              Null_Predicate => Predicate.Null_Predicate,
                              Predicate_Match => Predicate.Match,
                              Predicate_Put => Predicate.Put,
                              Expression_Object => Expression.Object,
                              Slot_Object_Expression => Expression.Value,
                              Alias_Expression => Expression.Value,
                              Expression_Evaluate => Expression.Evaluate,
                              Expression_Put => Expression.Put);

    package Rule_Base is
       new  
           Generic_Rule_Base
              (Max_Rules => Max_Rules,
               Max_Condition_Elements_By_Rule =>  
                  Max_Condition_Elements_By_Rule,
               Max_Condition_Elements => Max_Condition_Elements,
               Rule_Bundles => Rule_Bundles,
               Fact_Name => Fact_Base.Class.User_Object,
               Fact_Collection => Fact_Base.Class.User_Objects,
               Empty_Fact_Collection => Fact_Base.Class.No_User_Objects,
               Fact_Put => Fact_Base.Class.Default_Put,
               Fact_Query => Fact_Base.Query.Object,
               Null_Fact_Query => Fact_Base.Query.Null_Query,
               Fact_Queries => Fact_Base.Query.Objects,
               Null_Premiss => Fact_Base.Query.Null_Queries,
               Retrieve => Fact_Base.Working_Memory.Retrieve,
               Queries_Put => Fact_Base.Query.Put);

    subtype Fact_Query      is Fact_Base.Query.Object;
    subtype Fact_Queries    is Fact_Base.Query.Objects;
    subtype Fact_Name       is Fact_Base.Class.User_Object;
    subtype Fact_Collection is Fact_Base.Class.User_Objects;
    subtype Rule_Id         is Rule_Base.Rule_Id;

    Empty_Fact_Collection : constant Fact_Collection :=
       Fact_Base.Class.No_User_Objects;
    No_Rule               : Rule_Id renames Rule_Base.No_Rule;

end Generic_Kbs;