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diff --git a/fuzzylite/fl/term/Discrete.h b/fuzzylite/fl/term/Discrete.h
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+/*
+ Author: Juan Rada-Vilela, Ph.D.
+ Copyright (C) 2010-2014 FuzzyLite Limited
+ All rights reserved
+
+ This file is part of fuzzylite.
+
+ fuzzylite is free software: you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or (at your option)
+ any later version.
+
+ fuzzylite is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with fuzzylite.  If not, see <http://www.gnu.org/licenses/>.
+
+ fuzzylite™ is a trademark of FuzzyLite Limited.
+
+ */
+
+#ifndef FL_DISCRETE_H
+#define FL_DISCRETE_H
+
+#include "fl/term/Term.h"
+
+#include <vector>
+#include <utility>
+
+namespace fl {
+
+    class FL_API Discrete : public Term {
+    public:
+        typedef std::pair<scalar, scalar> Pair;
+    protected:
+        std::vector<Pair> _xy;
+    public:
+        explicit Discrete(const std::string& name = "",
+                const std::vector<Pair>& xy = std::vector<Pair>(),
+                scalar height = 1.0);
+        virtual ~Discrete() FL_IOVERRIDE;
+        FL_DEFAULT_COPY_AND_MOVE(Discrete)
+
+        virtual std::string className() const FL_IOVERRIDE;
+        virtual std::string parameters() const FL_IOVERRIDE;
+        virtual void configure(const std::string& parameters) FL_IOVERRIDE;
+
+        //Warning: this method is unsafe. Make sure you use it correctly.
+        template <typename T>
+        static Discrete* create(const std::string& name, int argc,
+                T x1, T y1, ...); // throw (fl::Exception);
+
+        virtual scalar membership(scalar x) const FL_IOVERRIDE;
+
+        virtual void setXY(const std::vector<Pair>& pairs);
+        virtual const std::vector<Pair>& xy() const;
+        virtual std::vector<Pair>& xy();
+        virtual const Pair& xy(int index) const;
+        virtual Pair& xy(int index);
+
+
+        static std::vector<scalar> toVector(const std::vector<Pair>& xy);
+        static std::vector<Pair> toPairs(const std::vector<scalar>& xy);
+        static std::vector<Pair> toPairs(const std::vector<scalar>& xy,
+                scalar missingValue) FL_INOEXCEPT;
+
+        static std::string formatXY(const std::vector<Pair>& xy,
+                const std::string& prefix = "(", const std::string& innerSeparator = ",",
+                const std::string& postfix = ")", const std::string& outerSeparator = " ");
+
+        virtual Discrete* clone() const FL_IOVERRIDE;
+
+        static Term* constructor();
+
+    };
+
+}
+#endif /* FL_DISCRETE_H */