diff --git a/src/main/java/ui/ActionPerformer.java b/src/main/java/ui/ActionPerformer.java
index a7c463b49cb155fa942cb2496ff37f843dad3f0c..c736b98e075a7d191d2544ca1b34f1e06a19d62d 100644
--- a/src/main/java/ui/ActionPerformer.java
+++ b/src/main/java/ui/ActionPerformer.java
@@ -953,6 +953,8 @@ public class ActionPerformer {
         	mgui.actionOnButton(TGComponentManager.COMPONENT, TGComponentManager.ELN_INDEPENDENT_VOLTAGE_SOURCE);
         } else if (command.equals(mgui.actions[TGUIAction.ELN_INDEPENDENT_CURRENT_SOURCE].getActionCommand())){
         	mgui.actionOnButton(TGComponentManager.COMPONENT, TGComponentManager.ELN_INDEPENDENT_CURRENT_SOURCE);
+  	} else if (command.equals(mgui.actions[TGUIAction.ELN_NODE_REF].getActionCommand())){
+        	mgui.actionOnButton(TGComponentManager.COMPONENT, TGComponentManager.ELN_NODE_REF);
 
             // Attack Tree Diagrams
         } else if (command.equals(mgui.actions[TGUIAction.ATD_BLOCK].getActionCommand())) {
diff --git a/src/main/java/ui/TGComponentManager.java b/src/main/java/ui/TGComponentManager.java
index 5f95fe9c2fbe1839ac0e4e773885ec0baba64dbc..80ee7c7b3b5839c8fa76087baaaac0d76ce7ff74 100644
--- a/src/main/java/ui/TGComponentManager.java
+++ b/src/main/java/ui/TGComponentManager.java
@@ -355,6 +355,7 @@ public class TGComponentManager {
     public static final int ELN_TRANSMISSION_LINE = 1617;
     public static final int ELN_INDEPENDENT_VOLTAGE_SOURCE = 1618;
     public static final int ELN_INDEPENDENT_CURRENT_SOURCE = 1619;
+    public static final int ELN_NODE_REF = 1620;
     
     // SMD diagram
     public static final int PROSMD_START_STATE = 2000;
@@ -1301,6 +1302,9 @@ public class TGComponentManager {
             case ELN_INDEPENDENT_CURRENT_SOURCE: 
             	tgc = new ELNComponentIndependentCurrentSource(x, y, tdp.getMinX(), tdp.getMaxX(), tdp.getMinY(), tdp.getMaxY(), false, null, tdp);
             	break;	
+            case ELN_NODE_REF: 
+            	tgc = new ELNComponentNodeRef(x, y, tdp.getMinX(), tdp.getMaxX(), tdp.getMinY(), tdp.getMaxY(), false, null, tdp);
+            	break;
             // Communication patterns + SD
             case TMLCP_CHOICE:
                 tgc = new TMLCPChoice(x, y, tdp.getMinX(), tdp.getMaxX(), tdp.getMinY(), tdp.getMaxY(), false, null, tdp);
@@ -1719,6 +1723,8 @@ public class TGComponentManager {
         	return ELN_INDEPENDENT_VOLTAGE_SOURCE;
         } else if (tgc instanceof ELNComponentIndependentCurrentSource) {
         	return ELN_INDEPENDENT_CURRENT_SOURCE;
+	} else if (tgc instanceof ELNComponentNodeRef) {
+        	return ELN_NODE_REF;
         	
         	// Others
         } else if (tgc instanceof TADDeterministicDelay) {
diff --git a/src/main/java/ui/TGConnectingPointWidthHeight.java b/src/main/java/ui/TGConnectingPointWidthHeight.java
index 2aa78f4151b7062f88521b0de266175b6a880d71..2aa5eab134416a667546a6080ab652674c219fb0 100755
--- a/src/main/java/ui/TGConnectingPointWidthHeight.java
+++ b/src/main/java/ui/TGConnectingPointWidthHeight.java
@@ -75,12 +75,4 @@ public class TGConnectingPointWidthHeight extends TGConnectingPoint{
     public void setH(double _h) {
         h = _h;
     }
-    
-    public double getW() {
-    	return w;
-    }
-    
-    public double getH() {
-    	return h;
-    }
 } // Class
diff --git a/src/main/java/ui/TGUIAction.java b/src/main/java/ui/TGUIAction.java
index 58b8b19922ebb8c43f0d464088add4ca4a9d404c..b2197e4670f2fed309bdd4a653d0ba5d98d0315c 100644
--- a/src/main/java/ui/TGUIAction.java
+++ b/src/main/java/ui/TGUIAction.java
@@ -297,6 +297,7 @@ public class TGUIAction extends AbstractAction {
     public static final int ELN_TRANSMISSION_LINE = 490; 
     public static final int ELN_INDEPENDENT_VOLTAGE_SOURCE = 491; 
     public static final int ELN_INDEPENDENT_CURRENT_SOURCE = 492; 
+    public static final int ELN_NODE_REF = 494; 
     
     public static final int EBRDD_EDIT = 271;
     public static final int EBRDD_CONNECTOR = 272;
@@ -651,7 +652,7 @@ public class TGUIAction extends AbstractAction {
     public static final int MOVE_ENABLED = 463;
     public static final int FIRST_DIAGRAM = 464;
     
-    public static final int NB_ACTION = 494;
+    public static final int NB_ACTION = 495;
 
     private static final TAction [] actions = new TAction[NB_ACTION];
 
@@ -1131,7 +1132,8 @@ public class TGUIAction extends AbstractAction {
         actions[ELN_TRANSMISSION_LINE] = new TAction("eln-transmission-line", "Add a transmission line", IconManager.imgic8016, IconManager.imgic8016, "Transmission line", "Add a transmission line to the currently opened ELN Diagram", 0);
         actions[ELN_INDEPENDENT_VOLTAGE_SOURCE] = new TAction("eln-vsource", "Add a independent voltage source", IconManager.imgic8017, IconManager.imgic8017, "Independent voltage source", "Add a independent voltage source to the currently opened ELN Diagram", 0);
         actions[ELN_INDEPENDENT_CURRENT_SOURCE] = new TAction("eln-isource", "Add a independent current source", IconManager.imgic8018, IconManager.imgic8018, "Independent current source", "Add a independent current source to the currently opened ELN Diagram", 0);
-        
+        actions[ELN_NODE_REF] = new TAction("eln-node-ref", "Add a reference node", IconManager.imgic8019, IconManager.imgic8019, "Reference node", "Add a reference node to the currently opened ELN Diagram", 0);
+
         //ProActive State Machine Diagram
         actions[PROSMD_EDIT] = new TAction("edit-prosmd-diagram", "Edit ProActive state machine diagram", IconManager.imgic100, IconManager.imgic101, "Edit ProActive state machine diagram", "Make it possible to edit the currently opened ProActive state machine diagram", 0);
         actions[PROSMD_START] = new TAction("add-prosmd-start", "Add Start state", IconManager.imgic222, IconManager.imgic222, "Start", "Add a start state to the currently opened ProActive state machine diagram", 0);
diff --git a/src/main/java/ui/eln/ELNConnector.java b/src/main/java/ui/eln/ELNConnector.java
index 51c09b570b45071e4f5955d619cdabeb23f74fa1..d7fb205cc581b47e2393e3b281aa94b91079c5b0 100644
--- a/src/main/java/ui/eln/ELNConnector.java
+++ b/src/main/java/ui/eln/ELNConnector.java
@@ -77,9 +77,17 @@ public  class ELNConnector extends TGConnector implements ScalableTGComponent {
 
     protected void drawLastSegment(Graphics g, int x1, int y1, int x2, int y2) {
         int cz = (int) (tdp.getZoom() * c);
-        g.fillOval(x2 - (cz / 2), y2 - (cz / 2), cz, cz);
-        g.fillOval(x1 - (cz / 2), y1 - (cz / 2), cz, cz);
-        g.drawLine(x1, y1, x2, y2);
+        if (p1.getName().equals("")) {
+        	g.fillOval(x2 - (cz / 2), y2 - (cz / 2), cz, cz);
+ 	        g.drawLine(x1, y1, x2, y2);
+        } else if (p2.getName().equals("")) {
+ 	        g.fillOval(x1 - (cz / 2), y1 - (cz / 2), cz, cz);
+ 	        g.drawLine(x1, y1, x2, y2);
+        } else {
+	        g.fillOval(x2 - (cz / 2), y2 - (cz / 2), cz, cz);
+	        g.fillOval(x1 - (cz / 2), y1 - (cz / 2), cz, cz);
+	        g.drawLine(x1, y1, x2, y2);
+        }
     }
 
     public void rescale(double scaleFactor){
@@ -102,4 +110,4 @@ public  class ELNConnector extends TGConnector implements ScalableTGComponent {
     public int getType() {
         return TGComponentManager.ELN_CONNECTOR;
     }
-}
\ No newline at end of file
+}
diff --git a/src/main/java/ui/eln/ELNDiagramToolBar.java b/src/main/java/ui/eln/ELNDiagramToolBar.java
index 3316775d3e99369c7d5a67286ba49b9a42349bd0..020f91dacda317522657f2c99ff308e026a9662b 100644
--- a/src/main/java/ui/eln/ELNDiagramToolBar.java
+++ b/src/main/java/ui/eln/ELNDiagramToolBar.java
@@ -67,6 +67,7 @@ public class ELNDiagramToolBar extends TToolBar {
 
 		mgui.actions[TGUIAction.ELN_EDIT].setEnabled(b);
 		mgui.actions[TGUIAction.UML_NOTE].setEnabled(b);
+		mgui.actions[TGUIAction.ELN_CONNECTOR].setEnabled(b);
 		mgui.actions[TGUIAction.ELN_RESISTOR].setEnabled(b);
 		mgui.actions[TGUIAction.ELN_CAPACITOR].setEnabled(b);
 		mgui.actions[TGUIAction.ELN_INDUCTOR].setEnabled(b);
@@ -76,6 +77,7 @@ public class ELNDiagramToolBar extends TToolBar {
 		mgui.actions[TGUIAction.ELN_TRANSMISSION_LINE].setEnabled(b);
 		mgui.actions[TGUIAction.ELN_INDEPENDENT_VOLTAGE_SOURCE].setEnabled(b);
 		mgui.actions[TGUIAction.ELN_INDEPENDENT_CURRENT_SOURCE].setEnabled(b);
+		mgui.actions[TGUIAction.ELN_NODE_REF].setEnabled(b);
 
 		mgui.actions[TGUIAction.ACT_MODEL_CHECKING].setEnabled(b);
 		mgui.actions[TGUIAction.ACT_ONECLICK_LOTOS_RG].setEnabled(b);
@@ -122,5 +124,14 @@ public class ELNDiagramToolBar extends TToolBar {
 		
 		button = this.add(mgui.actions[TGUIAction.ELN_INDEPENDENT_CURRENT_SOURCE]);
 		button.addMouseListener(mgui.mouseHandler);
+		
+		button = this.add(mgui.actions[TGUIAction.ELN_NODE_REF]);
+		button.addMouseListener(mgui.mouseHandler);
+		
+		this.addSeparator();
+		
+		button = this.add(mgui.actions[TGUIAction.ELN_CONNECTOR]);
+		button.addMouseListener(mgui.mouseHandler);
 	}
 }
+
diff --git a/src/main/java/ui/eln/sca_eln/ELNComponentNodeRef.java b/src/main/java/ui/eln/sca_eln/ELNComponentNodeRef.java
new file mode 100644
index 0000000000000000000000000000000000000000..58690462b61d89bf1c9a65780d98c7230cb8fac9
--- /dev/null
+++ b/src/main/java/ui/eln/sca_eln/ELNComponentNodeRef.java
@@ -0,0 +1,436 @@
+/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
+ *
+ * ludovic.apvrille AT enst.fr
+ *
+ * This software is a computer program whose purpose is to allow the
+ * edition of TURTLE analysis, design and deployment diagrams, to
+ * allow the generation of RT-LOTOS or Java code from this diagram,
+ * and at last to allow the analysis of formal validation traces
+ * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
+ * from INRIA Rhone-Alpes.
+ *
+ * This software is governed by the CeCILL  license under French law and
+ * abiding by the rules of distribution of free software.  You can  use,
+ * modify and/ or redistribute the software under the terms of the CeCILL
+ * license as circulated by CEA, CNRS and INRIA at the following URL
+ * "http://www.cecill.info".
+ *
+ * As a counterpart to the access to the source code and  rights to copy,
+ * modify and redistribute granted by the license, users are provided only
+ * with a limited warranty  and the software's author,  the holder of the
+ * economic rights,  and the successive licensors  have only  limited
+ * liability.
+ *
+ * In this respect, the user's attention is drawn to the risks associated
+ * with loading,  using,  modifying and/or developing or reproducing the
+ * software by the user in light of its specific status of free software,
+ * that may mean  that it is complicated to manipulate,  and  that  also
+ * therefore means  that it is reserved for developers  and  experienced
+ * professionals having in-depth computer knowledge. Users are therefore
+ * encouraged to load and test the software's suitability as regards their
+ * requirements in conditions enabling the security of their systems and/or
+ * data to be ensured and,  more generally, to use and operate it in the
+ * same conditions as regards security.
+ *
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL license and that you accept its terms.
+ */
+
+package ui.eln.sca_eln;
+
+import myutil.GraphicLib;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import ui.*;
+import ui.eln.ELNConnectingPoint;
+import ui.window.JDialogELNComponentNodeRef;
+import ui.window.JDialogELNComponentResistor;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+/**
+ * Class ELNComponentNodeRef Reference node to be used in ELN diagrams Creation:
+ * 27/06/2018
+ * 
+ * @version 1.0 27/06/2018
+ * @author Irina Kit Yan LEE
+ */
+
+public class ELNComponentNodeRef extends TGCScalableWithInternalComponent implements ActionListener {
+	protected Color myColor;
+	protected int orientation;
+	private int maxFontSize = 14;
+	private int minFontSize = 4;
+	private int currentFontSize = -1;
+
+	private int textX = 15;
+	private double dtextX = 0.0;
+	protected int decPoint = 3;
+
+	private int position = 0;
+	private boolean fv = false, fh = false;
+	private int old;
+	private boolean first;
+
+	public ELNComponentNodeRef(int _x, int _y, int _minX, int _maxX, int _minY, int _maxY, boolean _pos,
+			TGComponent _father, TDiagramPanel _tdp) {
+		super(_x, _y, _minX, _maxX, _minY, _maxY, _pos, _father, _tdp);
+
+		initScaling(40, 40);
+
+		dtextX = textX * oldScaleFactor;
+		textX = (int) dtextX;
+		dtextX = dtextX - textX;
+
+		minWidth = 1;
+		minHeight = 1;
+
+		initConnectingPoint(1);
+
+		addTGConnectingPointsComment();
+
+		moveable = true;
+		editable = true;
+		removable = true;
+		userResizable = false;
+		value = tdp.findELNComponentName("gnd");
+
+		old = width;
+		width = height;
+		height = old;
+	}
+
+	public void initConnectingPoint(int nb) {
+		nbConnectingPoint = nb;
+		connectingPoint = new TGConnectingPoint[nb];
+		connectingPoint[0] = new ELNConnectingPoint(this, 0, 0, true, true, 0.5, 0.0, "");
+	}
+
+	public Color getMyColor() {
+		return myColor;
+	}
+
+	public void internalDrawing(Graphics g) {
+		Font f = g.getFont();
+		Font fold = f;
+
+		if (this.rescaled && !this.tdp.isScaled()) {
+			this.rescaled = false;
+			int maxCurrentFontSize = Math.max(0, Math.min(this.height, (int) (this.maxFontSize * this.tdp.getZoom())));
+			f = f.deriveFont((float) maxCurrentFontSize);
+
+			while (maxCurrentFontSize > (this.minFontSize * this.tdp.getZoom() - 1)) {
+				if (g.getFontMetrics().stringWidth(value) < (width - (2 * textX))) {
+					break;
+				}
+				maxCurrentFontSize--;
+				f = f.deriveFont((float) maxCurrentFontSize);
+			}
+
+			if (this.currentFontSize < this.minFontSize * this.tdp.getZoom()) {
+				maxCurrentFontSize++;
+				f = f.deriveFont((float) maxCurrentFontSize);
+			}
+			g.setFont(f);
+			this.currentFontSize = maxCurrentFontSize;
+		} else {
+			f = f.deriveFont(this.currentFontSize);
+		}
+
+		Color c = g.getColor();
+
+		if (position == 0) {
+			if (first == false) {
+				first = true;
+				old = width;
+				width = height;
+				height = old;
+			}
+
+			int attributeFontSize = this.currentFontSize * 5 / 6;
+			int w = g.getFontMetrics().stringWidth(value);
+			g.setFont(f.deriveFont((float) attributeFontSize));
+			g.setFont(f);
+			g.setFont(f.deriveFont(Font.BOLD));
+			g.drawString(value, x + (width - w) / 2, y - height / 2);
+			g.setFont(f.deriveFont(Font.PLAIN));
+
+			if (fv == true) {
+				rotateBottom(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(0.5);
+				((ELNConnectingPoint) connectingPoint[0]).setH(1.0);
+			} else {
+				rotateTop(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(0.5);
+				((ELNConnectingPoint) connectingPoint[0]).setH(0.0);
+			}
+		} else if (position == 1) {
+			if (first == false) {
+				first = true;
+				old = width;
+				width = height;
+				height = old;
+			}
+
+			int attributeFontSize = this.currentFontSize * 5 / 6;
+			int w = g.getFontMetrics().stringWidth(value);
+			g.setFont(f.deriveFont((float) attributeFontSize));
+			g.setFont(f);
+			g.setFont(f.deriveFont(Font.BOLD));
+			g.drawString(value, x + (width - w) / 2, y - height / 2);
+			g.setFont(f.deriveFont(Font.PLAIN));
+
+			if (fh == true) {
+				rotateLeft(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(0.0);
+				((ELNConnectingPoint) connectingPoint[0]).setH(0.5);
+			} else {
+				rotateRight(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(1.0);
+				((ELNConnectingPoint) connectingPoint[0]).setH(0.5);
+			}
+		} else if (position == 2) {
+			if (first == false) {
+				first = true;
+				old = width;
+				width = height;
+				height = old;
+			}
+
+			int attributeFontSize = this.currentFontSize * 5 / 6;
+			int w = g.getFontMetrics().stringWidth(value);
+			g.setFont(f.deriveFont((float) attributeFontSize));
+			g.setFont(f);
+			g.setFont(f.deriveFont(Font.BOLD));
+			g.drawString(value, x + (width - w) / 2, y - height / 2);
+			g.setFont(f.deriveFont(Font.PLAIN));
+
+			if (fv == true) {
+				rotateTop(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(0.5);
+				((ELNConnectingPoint) connectingPoint[0]).setH(0.0);
+			} else {
+				rotateBottom(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(0.5);
+				((ELNConnectingPoint) connectingPoint[0]).setH(1.0);
+			}
+		} else if (position == 3) {
+			if (first == false) {
+				first = true;
+				old = width;
+				width = height;
+				height = old;
+			}
+
+			int attributeFontSize = this.currentFontSize * 5 / 6;
+			int w = g.getFontMetrics().stringWidth(value);
+			g.setFont(f.deriveFont((float) attributeFontSize));
+			g.setFont(f);
+			g.setFont(f.deriveFont(Font.BOLD));
+			g.drawString(value, x + (width - w) / 2, y - height / 2);
+			g.setFont(f.deriveFont(Font.PLAIN));
+
+			if (fh == true) {
+				rotateRight(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(1.0);
+				((ELNConnectingPoint) connectingPoint[0]).setH(0.5);
+			} else {
+				rotateLeft(g);
+				((ELNConnectingPoint) connectingPoint[0]).setW(0.0);
+				((ELNConnectingPoint) connectingPoint[0]).setH(0.5);
+			}
+		}
+		g.setColor(c);
+		g.setFont(fold);
+	}
+
+	private void rotateTop(Graphics g) {
+		int[] ptx = { x + width / 2, x + width / 2, x, x, x + width, x + width, x + width / 2 };
+		int[] pty = { y, y + height / 2, y + height / 2, y + height, y + height, y + height / 2, y + height / 2 };
+		g.drawPolygon(ptx, pty, 7);
+		g.fillPolygon(ptx, pty, 7);
+	}
+
+	private void rotateBottom(Graphics g) {
+		int[] ptx = { x + width / 2, x + width / 2, x, x, x + width, x + width, x + width / 2 };
+		int[] pty = { y + height, y + height / 2, y + height / 2, y, y, y + height / 2, y + height / 2 };
+		g.drawPolygon(ptx, pty, 7);
+		g.fillPolygon(ptx, pty, 7);
+	}
+
+	private void rotateRight(Graphics g) {
+		int[] ptx = { x + width, x + width / 2, x + width / 2, x, x, x + width / 2, x + width / 2 };
+		int[] pty = { y + height / 2, y + height / 2, y, y, y + height, y + height, y + height / 2 };
+		g.drawPolygon(ptx, pty, 7);
+		g.fillPolygon(ptx, pty, 7);
+	}
+
+	private void rotateLeft(Graphics g) {
+		int[] ptx = { x, x + width / 2, x + width / 2, x + width, x + width, x + width / 2, x + width / 2 };
+		int[] pty = { y + height / 2, y + height / 2, y, y, y + height, y + height, y + height / 2 };
+		g.drawPolygon(ptx, pty, 7);
+		g.fillPolygon(ptx, pty, 7);
+	}
+
+	public TGComponent isOnOnlyMe(int _x, int _y) {
+		if (GraphicLib.isInRectangle(_x, _y, x, y, width, height)) {
+			return this;
+		}
+		return null;
+	}
+
+	public int getType() {
+		return TGComponentManager.ELN_NODE_REF;
+	}
+
+	public boolean editOndoubleClick(JFrame frame) {
+		JDialogELNComponentNodeRef jde = new JDialogELNComponentNodeRef(this);
+		jde.setVisible(true);
+		return true;
+	}
+
+	protected String translateExtraParam() {
+		StringBuffer sb = new StringBuffer("<extraparam>\n");
+		sb.append("<attributes position=\"" + position);
+		sb.append("\" width=\"" + width);
+		sb.append("\" height=\"" + height);
+		sb.append("\" fv=\"" + fv);
+		sb.append("\" fh=\"" + fh);
+		sb.append("\" first=\"" + first + "\"");
+		sb.append("/>\n");
+		sb.append("</extraparam>\n");
+		return new String(sb);
+	}
+
+	public void loadExtraParam(NodeList nl, int decX, int decY, int decId) throws MalformedModelingException {
+		try {
+			NodeList nli;
+			Node n1, n2;
+			Element elt;
+
+			int position, width, height;
+			boolean fv, fh, first;
+
+			for (int i = 0; i < nl.getLength(); i++) {
+				n1 = nl.item(i);
+				if (n1.getNodeType() == Node.ELEMENT_NODE) {
+					nli = n1.getChildNodes();
+					for (int j = 0; j < nli.getLength(); j++) {
+						n2 = nli.item(j);
+						if (n2.getNodeType() == Node.ELEMENT_NODE) {
+							elt = (Element) n2;
+							if (elt.getTagName().equals("attributes")) {
+								position = Integer.parseInt(elt.getAttribute("position"));
+								width = Integer.parseInt(elt.getAttribute("width"));
+								height = Integer.parseInt(elt.getAttribute("height"));
+								fv = Boolean.parseBoolean(elt.getAttribute("fv"));
+								fh = Boolean.parseBoolean(elt.getAttribute("fh"));
+								first = Boolean.parseBoolean(elt.getAttribute("first"));
+								setPosition(position);
+								this.width = width;
+								this.height = height;
+								setFv(fv);
+								setFh(fh);
+								setFirst(first);
+							}
+						}
+					}
+				}
+			}
+		} catch (Exception e) {
+			throw new MalformedModelingException();
+		}
+	}
+
+	public void addActionToPopupMenu(JPopupMenu componentMenu, ActionListener menuAL, int x, int y) {
+		componentMenu.addSeparator();
+
+		JMenuItem rotateright = new JMenuItem("Rotate right 90°");
+		rotateright.addActionListener(this);
+		componentMenu.add(rotateright);
+
+		JMenuItem rotateleft = new JMenuItem("Rotate left 90°");
+		rotateleft.addActionListener(this);
+		componentMenu.add(rotateleft);
+
+		componentMenu.addSeparator();
+
+		JMenuItem rotatevertically = new JMenuItem("Flip vertically");
+		rotatevertically.addActionListener(this);
+		componentMenu.add(rotatevertically);
+
+		JMenuItem rotatehorizontally = new JMenuItem("Flip horizontally");
+		rotatehorizontally.addActionListener(this);
+		componentMenu.add(rotatehorizontally);
+	}
+
+	public void actionPerformed(ActionEvent e) {
+		fv = false;
+		fh = false;
+		if (e.getActionCommand().equals("Rotate right 90°")) {
+			position++;
+			position %= 4;
+			first = false;
+		}
+		if (e.getActionCommand().equals("Rotate left 90°")) {
+			position = position + 3;
+			position %= 4;
+			first = false;
+		}
+		if (e.getActionCommand().equals("Flip vertically")) {
+			if (fv == false) {
+				fv = true;
+			} else {
+				fv = false;
+			}
+		}
+		if (e.getActionCommand().equals("Flip horizontally")) {
+			if (fh == false) {
+				fh = true;
+			} else {
+				fh = false;
+			}
+		}
+	}
+
+	public int getDefaultConnector() {
+		return TGComponentManager.ELN_CONNECTOR;
+	}
+
+	public int getPosition() {
+		return position;
+	}
+
+	public void setPosition(int position) {
+		this.position = position;
+	}
+
+	public boolean isFv() {
+		return fv;
+	}
+
+	public void setFv(boolean fv) {
+		this.fv = fv;
+	}
+
+	public boolean isFh() {
+		return fh;
+	}
+
+	public void setFh(boolean fh) {
+		this.fh = fh;
+	}
+
+	public boolean isFirst() {
+		return first;
+	}
+
+	public void setFirst(boolean first) {
+		this.first = first;
+	}
+}
diff --git a/src/main/java/ui/util/IconManager.java b/src/main/java/ui/util/IconManager.java
index 0cc4c9ee26a18425b2115c52735c34ead9201e8c..28b8b62f0039a37f2057861812a2e2b88753631b 100755
--- a/src/main/java/ui/util/IconManager.java
+++ b/src/main/java/ui/util/IconManager.java
@@ -186,7 +186,7 @@ public class IconManager {
     public static ImageIcon imgic8000, imgic8001, imgic8002, imgic8003, imgic8004, imgic8005, imgic8006, imgic8007, imgic8008;
 
     // ELN
-    public static ImageIcon imgic8010, imgic8011, imgic8012, imgic8013, imgic8014, imgic8015, imgic8016, imgic8017, imgic8018;
+    public static ImageIcon imgic8010, imgic8011, imgic8012, imgic8013, imgic8014, imgic8015, imgic8016, imgic8017, imgic8018, imgic8019;
     
     //private static String icon7 = "turtle_large.gif";
     private static String ttoolStringIcon = "starting_logo.gif";
@@ -683,6 +683,7 @@ public class IconManager {
     private static String icon8016 = "elntransmissionline.gif";
     private static String icon8017 = "elnvsource.gif";
     private static String icon8018 = "elnisource.gif";
+    private static String icon8019 = "elnground.gif"
 
     public IconManager() {
 
@@ -1190,6 +1191,7 @@ public class IconManager {
         imgic8016 = getIcon(icon8016);
         imgic8017 = getIcon(icon8017);
         imgic8018 = getIcon(icon8018);
+        imgic8019 = getIcon(icon8019);
     }
 
 } // Class
diff --git a/src/main/java/ui/window/JDialogELNComponentNodeRef.java b/src/main/java/ui/window/JDialogELNComponentNodeRef.java
new file mode 100644
index 0000000000000000000000000000000000000000..85e4380b1eb814d8e6b8e55de794b7576caa2f5b
--- /dev/null
+++ b/src/main/java/ui/window/JDialogELNComponentNodeRef.java
@@ -0,0 +1,179 @@
+/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
+ * 
+ * ludovic.apvrille AT enst.fr
+ * 
+ * This software is a computer program whose purpose is to allow the
+ * edition of TURTLE analysis, design and deployment diagrams, to
+ * allow the generation of RT-LOTOS or Java code from this diagram,
+ * and at last to allow the analysis of formal validation traces
+ * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
+ * from INRIA Rhone-Alpes.
+ * 
+ * This software is governed by the CeCILL  license under French law and
+ * abiding by the rules of distribution of free software.  You can  use,
+ * modify and/ or redistribute the software under the terms of the CeCILL
+ * license as circulated by CEA, CNRS and INRIA at the following URL
+ * "http://www.cecill.info".
+ * 
+ * As a counterpart to the access to the source code and  rights to copy,
+ * modify and redistribute granted by the license, users are provided only
+ * with a limited warranty  and the software's author,  the holder of the
+ * economic rights,  and the successive licensors  have only  limited
+ * liability.
+ * 
+ * In this respect, the user's attention is drawn to the risks associated
+ * with loading,  using,  modifying and/or developing or reproducing the
+ * software by the user in light of its specific status of free software,
+ * that may mean  that it is complicated to manipulate,  and  that  also
+ * therefore means  that it is reserved for developers  and  experienced
+ * professionals having in-depth computer knowledge. Users are therefore
+ * encouraged to load and test the software's suitability as regards their
+ * requirements in conditions enabling the security of their systems and/or
+ * data to be ensured and,  more generally, to use and operate it in the
+ * same conditions as regards security.
+ * 
+ * The fact that you are presently reading this means that you have had
+ * knowledge of the CeCILL license and that you accept its terms.
+ */
+
+package ui.window;
+
+import ui.eln.sca_eln.ELNComponentNodeRef;
+import ui.util.IconManager;
+
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.Font;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.GridLayout;
+import java.awt.Insets;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.AbstractAction;
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.JButton;
+import javax.swing.JComboBox;
+import javax.swing.JComponent;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+import javax.swing.KeyStroke;
+
+/**
+ * Class JDialogELNComponentNodeRef
+ * Dialog for managing of ELN reference node
+ * Creation: 29/06/2018
+ * @version 1.0 29/06/2018
+ * @author Irina Kit Yan LEE
+*/
+
+@SuppressWarnings("serial")
+
+public class JDialogELNComponentNodeRef extends JDialog implements ActionListener {
+
+	/** Access to ActionPerformed **/
+	private JTextField nameTextField;
+
+	/** Parameters **/
+	private ELNComponentNodeRef gnd;
+
+	/** Constructor **/
+	public JDialogELNComponentNodeRef(ELNComponentNodeRef _gnd) {
+		/** Set JDialog **/
+		setTitle("Setting the reference node");
+		setLocationRelativeTo(null);
+		setVisible(true);
+		setAlwaysOnTop(true);
+		setResizable(false);
+
+		/** Parameters **/
+		gnd = _gnd;
+		
+		getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke("ESCAPE"), "close");
+        getRootPane().getActionMap().put("close", new AbstractAction() {
+        	public void actionPerformed(ActionEvent e) {
+                dispose();
+        	}
+        });
+		
+		dialog();
+	}
+
+	public void dialog() {
+		/** JPanel **/
+		JPanel mainPanel = new JPanel(new BorderLayout());
+		this.add(mainPanel);
+		
+		JPanel attributesMainPanel = new JPanel(new GridLayout());
+		mainPanel.add(attributesMainPanel, BorderLayout.NORTH);
+		
+		// Left Side
+		Box box = Box.createVerticalBox();
+		box.setBorder(BorderFactory.createTitledBorder("Setting reference node attributes"));
+
+		GridBagLayout gridBag = new GridBagLayout();
+	    GridBagConstraints constraints = new GridBagConstraints();
+	    JPanel boxPanel = new JPanel();
+	    boxPanel.setFont(new Font("Helvetica", Font.PLAIN, 14));
+	    boxPanel.setLayout(gridBag); 
+	    
+	    JLabel labelName = new JLabel("nm : ");
+	    constraints = new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0,
+                GridBagConstraints.CENTER,
+                GridBagConstraints.BOTH,
+                new Insets(5, 10, 5, 10), 0, 0);
+        gridBag.setConstraints(labelName, constraints);
+	    boxPanel.add(labelName);
+
+		nameTextField = new JTextField(gnd.getValue().toString(), 10); // name not empty
+	    constraints = new GridBagConstraints(1, 0, 2, 1, 1.0, 1.0,
+                GridBagConstraints.CENTER,
+                GridBagConstraints.BOTH,
+                new Insets(5, 10, 5, 10), 0, 0);
+	    gridBag.setConstraints(nameTextField, constraints);
+	    boxPanel.add(nameTextField);
+	    
+		box.add(boxPanel); // add border to box
+		attributesMainPanel.add(box); // add grid to grid
+
+		// Down Side
+		JPanel downPanel = new JPanel(new FlowLayout());
+
+		JButton saveCloseButton = new JButton("Save and close");
+		saveCloseButton.setIcon(IconManager.imgic25);
+		saveCloseButton.setActionCommand("Save_Close");
+		saveCloseButton.addActionListener(this);
+		saveCloseButton.setPreferredSize(new Dimension(200, 30));
+		downPanel.add(saveCloseButton);
+
+		JButton cancelButton = new JButton("Cancel");
+		cancelButton.setIcon(IconManager.imgic27);
+		cancelButton.setActionCommand("Cancel");
+		cancelButton.addActionListener(this);
+		cancelButton.setPreferredSize(new Dimension(200, 30));
+		downPanel.add(cancelButton);
+
+		mainPanel.add(downPanel, BorderLayout.CENTER);
+		pack();
+		this.getRootPane().setDefaultButton(saveCloseButton);
+	}
+
+	public void actionPerformed(ActionEvent e) {
+		if ("Save_Close".equals(e.getActionCommand())) {
+			gnd.setValue(new String(nameTextField.getText()));
+			
+			this.dispose();
+		}
+
+		if ("Cancel".equals(e.getActionCommand())) {
+			this.dispose();
+		}
+	}
+}
+
diff --git a/src/main/resources/ui/util/elnground.gif b/src/main/resources/ui/util/elnground.gif
new file mode 100644
index 0000000000000000000000000000000000000000..0c8df1962468c06409e45128b3ca5d3d3fb6222c
Binary files /dev/null and b/src/main/resources/ui/util/elnground.gif differ