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+/*
+ fuzzylite (R), a fuzzy logic control library in C++.
+ Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved.
+ Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com>
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the FuzzyLite License included with the software.
+
+ You should have received a copy of the FuzzyLite License along with
+ fuzzylite. If not, see <http://www.fuzzylite.com/license/>.
+
+ fuzzylite is a registered trademark of FuzzyLite Limited.
+ */
+
+#ifndef FL_PROPORTIONAL_H
+#define FL_PROPORTIONAL_H
+
+#include "fl/activation/Activation.h"
+
+namespace fl {
+
+    /**
+      The Proportional class is a RuleBlock Activation method that activates
+      the rules utilizing activation degrees proportional to the activation
+      degrees of the other rules, thus the sum of the activation degrees is
+      equal to one.
+
+      @author Juan Rada-Vilela, Ph.D.
+      @see Rule
+      @see RuleBlock
+      @see ActivationFactory
+      @since 6.0
+     */
+    class FL_API Proportional : public Activation {
+    public:
+        Proportional();
+        virtual ~Proportional();
+        FL_DEFAULT_COPY_AND_MOVE(Proportional)
+
+        virtual std::string className() const FL_IOVERRIDE;
+
+        /**
+          No parameters are required to configure the activation method
+          @return an empty string
+         */
+        virtual std::string parameters() const FL_IOVERRIDE;
+
+        /**
+          No parameters are required to configure the activation method
+          @param parameters is an empty string
+         */
+        virtual void configure(const std::string& parameters) FL_IOVERRIDE;
+
+        virtual Complexity complexity(const RuleBlock* ruleBlock) const FL_IOVERRIDE;
+
+        /**
+          Activates the rules utilizing activation degrees proportional to
+          the activation degrees of the other rules in the rule block.
+          @param ruleBlock is the rule block to activate.
+         */
+        virtual void activate(RuleBlock* ruleBlock) FL_IOVERRIDE;
+
+        virtual Proportional* clone() const FL_IOVERRIDE;
+
+        static Activation* constructor();
+    };
+}
+
+#endif /* FL_PROPORTIONAL_H */