--- a/src/metadataview.cpp	Tue May 19 10:13:04 2015 +0200
+++ b/src/metadataview.cpp	Tue May 19 11:12:22 2015 +0200
@@ -23,12 +23,32 @@
 #include <QFontMetrics>
 #include <QApplication>
 
+/**@brief Small wrapper around csv model to enable numerical sorting. */
+class numericSortCSVModel : public QxtCsvModel
+{
+public:
+    /**@brief returns the data as string, integer or double variant. */
+    QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const {
+        QVariant base = QxtCsvModel::data(index, role);
+        bool ok = false;
+        int intVal = base.toInt(&ok);
+        if (ok) {
+            return intVal;
+        }
+        double dblVal = base.toDouble(&ok);
+        if (ok) {
+            return dblVal;
+        }
+        return base;
+    }
+};
+
 MetaDataView::MetaDataView(QWidget *parent, Qt::WindowFlags f) :
     QWidget(parent, f),
     mDateColIdx(-1) {
     /* Create models */
     mSortModel = new QSortFilterProxyModel;
-    mCSVModel = new QxtCsvModel;
+    mCSVModel = new numericSortCSVModel;
     setupGUI();
 
     connect(mView->selectionModel(), &QItemSelectionModel::selectionChanged,