diff --git a/core/include/Data/DataSeries.h b/core/include/Data/DataSeries.h
new file mode 100644
index 0000000..f4315f0
--- /dev/null
+++ b/core/include/Data/DataSeries.h
@@ -0,0 +1,50 @@
+#ifndef SCIQLOP_DATASERIES_H
+#define SCIQLOP_DATASERIES_H
+
+#include <Data/ArrayData.h>
+#include <Data/IDataSeries.h>
+
+#include <memory>
+
+/**
+ * @brief The DataSeries class is the base (abstract) implementation of IDataSeries.
+ *
+ * It proposes to set a dimension for the values ​​data
+ *
+ * @tparam Dim The dimension of the values data
+ *
+ */
+template <int Dim>
+class DataSeries : public IDataSeries {
+public:
+    /// @sa IDataSeries::xAxisData()
+    std::shared_ptr<ArrayData<1> > xAxisData() override { return m_XAxisData; }
+
+    /// @sa IDataSeries::xAxisUnit()
+    QString xAxisUnit() const override { return m_XAxisUnit; }
+
+    /// @return the values dataset
+    std::shared_ptr<ArrayData<Dim> > valuesData() const { return m_ValuesData; }
+
+    /// @sa IDataSeries::valuesUnit()
+    QString valuesUnit() const override { return m_ValuesUnit; }
+
+protected:
+    /// Protected ctor (DataSeries is abstract)
+    explicit DataSeries(std::shared_ptr<ArrayData<1> > xAxisData, const QString &xAxisUnit,
+                        std::shared_ptr<ArrayData<Dim> > valuesData, const QString &valuesUnit)
+            : m_XAxisData{xAxisData},
+              m_XAxisUnit{xAxisUnit},
+              m_ValuesData{valuesData},
+              m_ValuesUnit{valuesUnit}
+    {
+    }
+
+private:
+    std::shared_ptr<ArrayData<1> > m_XAxisData;
+    QString m_XAxisUnit;
+    std::shared_ptr<ArrayData<Dim> > m_ValuesData;
+    QString m_ValuesUnit;
+};
+
+#endif // SCIQLOP_DATASERIES_H
diff --git a/core/include/Data/IDataSeries.h b/core/include/Data/IDataSeries.h
new file mode 100644
index 0000000..0278a8e
--- /dev/null
+++ b/core/include/Data/IDataSeries.h
@@ -0,0 +1,37 @@
+#ifndef SCIQLOP_IDATASERIES_H
+#define SCIQLOP_IDATASERIES_H
+
+#include <QString>
+
+#include <memory>
+
+template <int Dim>
+class ArrayData;
+
+/**
+ * @brief The IDataSeries aims to declare a data series.
+ *
+ * A data series is an entity that contains at least :
+ * - one dataset representing the x-axis
+ * - one dataset representing the values
+ *
+ * Each dataset is represented by an ArrayData, and is associated with a unit.
+ *
+ * An ArrayData can be unidimensional or two-dimensional, depending on the implementation of the
+ * IDataSeries. The x-axis dataset is always unidimensional.
+ *
+ * @sa ArrayData
+ */
+class IDataSeries {
+public:
+    virtual ~IDataSeries() noexcept = default;
+
+    /// Returns the x-axis dataset
+    virtual std::shared_ptr<ArrayData<1> > xAxisData() = 0;
+
+    virtual QString xAxisUnit() const = 0;
+
+    virtual QString valuesUnit() const = 0;
+};
+
+#endif // SCIQLOP_IDATASERIES_H