diff --git a/core/include/Variable/Variable.h b/core/include/Variable/Variable.h
index dbdab81..55ba6c9 100644
--- a/core/include/Variable/Variable.h
+++ b/core/include/Variable/Variable.h
@@ -3,6 +3,7 @@
 
 #include <Common/spimpl.h>
 
+class IDataSeries;
 class QString;
 
 /**
@@ -16,6 +17,8 @@ public:
     QString mission() const noexcept;
     QString unit() const noexcept;
 
+    void addDataSeries(std::unique_ptr<IDataSeries> dataSeries) noexcept;
+
 private:
     class VariablePrivate;
     spimpl::unique_impl_ptr<VariablePrivate> impl;
diff --git a/core/src/Variable/Variable.cpp b/core/src/Variable/Variable.cpp
index 22d3775..02a2713 100644
--- a/core/src/Variable/Variable.cpp
+++ b/core/src/Variable/Variable.cpp
@@ -1,14 +1,17 @@
 #include "Variable/Variable.h"
 
+#include <Data/IDataSeries.h>
+
 struct Variable::VariablePrivate {
     explicit VariablePrivate(const QString &name, const QString &unit, const QString &mission)
-            : m_Name{name}, m_Unit{unit}, m_Mission{mission}
+            : m_Name{name}, m_Unit{unit}, m_Mission{mission}, m_DataSeries{nullptr}
     {
     }
 
     QString m_Name;
     QString m_Unit;
     QString m_Mission;
+    std::unique_ptr<IDataSeries> m_DataSeries;
 };
 
 Variable::Variable(const QString &name, const QString &unit, const QString &mission)
@@ -30,3 +33,11 @@ QString Variable::unit() const noexcept
 {
     return impl->m_Unit;
 }
+
+void Variable::addDataSeries(std::unique_ptr<IDataSeries> dataSeries) noexcept
+{
+    if (!impl->m_DataSeries) {
+        impl->m_DataSeries = std::move(dataSeries);
+    }
+    /// @todo : else, merge the two data series (if possible)
+}