diff --git a/sources/editor/graphicspart/partterminal.cpp b/sources/editor/graphicspart/partterminal.cpp
index c89fe8a9e..0335ab974 100644
--- a/sources/editor/graphicspart/partterminal.cpp
+++ b/sources/editor/graphicspart/partterminal.cpp
@@ -98,7 +98,7 @@ void PartTerminal::paint(
 	// dessin de la borne en rouge
 	t.setColor(isSelected() ? Terminal::neutralColor : Qt::red);
 	painter -> setPen(t);
-	painter -> drawLine(QPointF(0.0, 0.0), d -> second_point);
+	painter -> drawLine(QPointF(0.0, 0.0), d -> m_second_point);
 
 	// dessin du point d'amarrage au conducteur en bleu
 	t.setColor(isSelected() ? Qt::red : Terminal::neutralColor);
@@ -118,7 +118,7 @@ void PartTerminal::paint(
 QPainterPath PartTerminal::shape() const
 {
 	QPainterPath shape;
-	shape.lineTo(d -> second_point);
+	shape.lineTo(d -> m_second_point);
 
 	QPainterPathStroker pps;
 	pps.setWidth(1);
@@ -132,7 +132,7 @@ QPainterPath PartTerminal::shape() const
 */
 QRectF PartTerminal::boundingRect() const
 {
-	QRectF br(QPointF(0, 0), d -> second_point);
+	QRectF br(QPointF(0, 0), d -> m_second_point);
 	br = br.normalized();
 
 	qreal adjust = (SHADOWS_HEIGHT + 1) / 2;
@@ -174,10 +174,10 @@ void PartTerminal::updateSecondPoint()
 {
 	qreal ts = 4.0; // terminal size
 	switch(d -> m_orientation) {
-		case Qet::North: d -> second_point = QPointF(0.0,  ts); break;
-		case Qet::East : d -> second_point = QPointF(-ts, 0.0); break;
-		case Qet::South: d -> second_point = QPointF(0.0, -ts); break;
-		case Qet::West : d -> second_point = QPointF(ts,  0.0); break;
+		case Qet::North: d -> m_second_point = QPointF(0.0,  ts); break;
+		case Qet::East : d -> m_second_point = QPointF(-ts, 0.0); break;
+		case Qet::South: d -> m_second_point = QPointF(0.0, -ts); break;
+		case Qet::West : d -> m_second_point = QPointF(ts,  0.0); break;
 	}
 }
 
diff --git a/sources/properties/terminaldata.cpp b/sources/properties/terminaldata.cpp
index ef6f80ef7..6a388c3c7 100644
--- a/sources/properties/terminaldata.cpp
+++ b/sources/properties/terminaldata.cpp
@@ -1,6 +1,7 @@
 #include "terminaldata.h"
 
 #include <QGraphicsObject>
+#include <QDebug>
 
 TerminalData::TerminalData():
 	PropertiesInterface()
@@ -58,8 +59,8 @@ void TerminalData::toSettings(QSettings &settings, const QString prefix) const
 */
 void TerminalData::fromSettings(const QSettings &settings, const QString prefix)
 {
-	Q_UNUSED(settings);
-	Q_UNUSED(prefix);
+	Q_UNUSED(settings)
+	Q_UNUSED(prefix)
 }
 
 /**
@@ -78,20 +79,17 @@ QDomElement TerminalData::toXml(QDomDocument &xml_document) const
 {
 	QDomElement xml_element = xml_document.createElement("terminal");
 
-	// write the position of the terminal
-	// ecrit la position de la borne
 	xml_element.setAttribute("x", QString("%1").arg(q->scenePos().x()));
 	xml_element.setAttribute("y", QString("%1").arg(q->scenePos().y()));
 
-	// Write name and number to XML
 	xml_element.setAttribute("uuid", m_uuid.toString());
 	xml_element.setAttribute("name", m_name);
 
-	// write the orientation of the terminal
-	// ecrit l'orientation de la borne
 	xml_element.setAttribute("orientation",
 				 Qet::orientationToString(m_orientation));
 
+	xml_element.setAttribute("type", typeToString(m_type));
+
 	return(xml_element);
 }
 
@@ -137,5 +135,45 @@ bool TerminalData::fromXml (const QDomElement &xml_element)
 	m_orientation = Qet::orientationFromString(
 				xml_element.attribute("orientation"));
 
+	m_type = typeFromString(xml_element.attribute("type"));
+
 	return true;
 }
+
+/**
+ * @brief TerminalData::typeToString
+ * @param type
+ * @return type into a QString
+ */
+QString TerminalData::typeToString(TerminalData::Type type)
+{
+	switch (type) {
+		case Generic:
+			return QString("Generic");
+		case TerminalInner :
+			return QString("TerminalInner");
+		case TerminalOuter :
+			return QString("TerminalOuter");
+	}
+}
+
+/**
+ * @brief TerminalData::typeFromString
+ * @param string
+ * @return The type describe in string to TerminalData::Type.
+ * if string doesn't describe a type, TerminalData::Generic is returned
+ */
+TerminalData::Type TerminalData::typeFromString(const QString &string)
+{
+	if (string == "Generic") {
+		return TerminalData::Generic;
+	} else if (string == "TerminalInner") {
+		return TerminalData::TerminalInner;
+	} else if (string == "TerminalOuter") {
+		return TerminalData::TerminalOuter;
+	} else {
+		qDebug() << "TerminalData::typeFromString, argument string is invalid"
+					" failsafe type 'TerminalData::Generic' is returned";
+		return TerminalData::Generic;
+	}
+}
diff --git a/sources/properties/terminaldata.h b/sources/properties/terminaldata.h
index 179c2aa1e..521e1b2e7 100644
--- a/sources/properties/terminaldata.h
+++ b/sources/properties/terminaldata.h
@@ -18,6 +18,12 @@ class QGraphicsObject;
 */
 class TerminalData : public PropertiesInterface
 {
+		enum Type {
+			Generic,
+			TerminalInner,
+			TerminalOuter
+		};
+
 	public:
 		TerminalData();
 		TerminalData(QGraphicsObject* parent);
@@ -33,6 +39,9 @@ class TerminalData : public PropertiesInterface
 		QDomElement toXml(QDomDocument &xml_element) const override;
 		bool fromXml(const QDomElement &xml_element) override;
 
+		static QString typeToString(TerminalData::Type type);
+		static TerminalData::Type typeFromString(const QString &string);
+
 	// must be public, because this class is a private member
 	// of PartTerminal/Terminal and they must access this data
 	public:
@@ -46,7 +55,7 @@ class TerminalData : public PropertiesInterface
 			Position of the second point of the terminal
 			in scene coordinates
 		*/
-		QPointF second_point;
+		QPointF m_second_point;
 		/**
 			@brief m_uuid
 			Uuid of the terminal.
@@ -80,6 +89,9 @@ class TerminalData : public PropertiesInterface
 			PartTerminal and Terminal have access to it.
 		*/
 		QPointF m_pos;
+
+		TerminalData::Type m_type = TerminalData::Generic;
+
 	private:
 		QGraphicsObject* q{nullptr};
 };