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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_SNORM_H
+#define FL_SNORM_H
+
+#include "fl/norm/Norm.h"
+
+namespace fl {
+
+    /**
+      The SNorm class is the base class for all S-Norms, and it is utilized as
+      the disjunction fuzzy logic operator and as the aggregation (or
+      `accumulation` in versions 5.0 and earlier) fuzzy logic operator.
+
+      @author Juan Rada-Vilela, Ph.D.
+      @see RuleBlock::getDisjunction()
+      @see OutputVariable::fuzzyOutput()
+      @see Aggregated::getAggregation()
+      @see SNormFactory
+      @see Norm
+      @since 4.0
+     */
+    class FL_API SNorm : public Norm {
+    public:
+
+        SNorm() {
+        }
+
+        virtual ~SNorm() FL_IOVERRIDE {
+        }
+
+        FL_DEFAULT_COPY_AND_MOVE(SNorm)
+
+        virtual SNorm* clone() const FL_IOVERRIDE = 0;
+    };
+}
+#endif  /* FL_SNORM_H */