diff --git a/sources/diagram.cpp b/sources/diagram.cpp
index 0a8a395c1..2efa92d5f 100644
--- a/sources/diagram.cpp
+++ b/sources/diagram.cpp
@@ -317,6 +317,13 @@ QDomDocument Diagram::toXml(bool whole_content) {
 		QDomElement default_conductor = document.createElement("defaultconductor");
 		defaultConductorProperties.toXml(default_conductor);
 		racine.appendChild(default_conductor);
+
+		//autonumerotation of conductor
+		if (!getNumerotation(Diagram::Conductors).isEmpty()) {
+			QDomElement autonum = document.createElement("autonum");
+			autonum.appendChild(getNumerotation(Diagram::Conductors).toXML(document, "conductor"));
+			racine.appendChild(autonum);
+		}
 	}
 	document.appendChild(racine);
 	
@@ -460,6 +467,16 @@ bool Diagram::fromXml(QDomElement &document, QPointF position, bool consider_inf
 		if (!default_conductor_elmt.isNull()) {
 			defaultConductorProperties.fromXml(default_conductor_elmt);
 		}
+		// find the first element autonum
+		QDomElement num_auto = root.firstChildElement("autonum");
+		if (!num_auto.isNull()) {
+			QDomElement num_conductor = num_auto.firstChildElement("conductor");
+			//set the auto-numerotation of conductor
+			if (!num_conductor.isNull()) {
+				NumerotationContext nc(num_conductor);
+				setNumerotation(Diagram::Conductors, nc);
+			}
+		}
 	}
 	
 	// si la racine n'a pas d'enfant : le chargement est fini (schema vide)
diff --git a/sources/numerotationcontext.cpp b/sources/numerotationcontext.cpp
index 61933ed87..a99063f8b 100644
--- a/sources/numerotationcontext.cpp
+++ b/sources/numerotationcontext.cpp
@@ -16,6 +16,20 @@
 	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "numerotationcontext.h"
+#include "qet.h"
+
+/**
+ * Constructor
+ */
+NumerotationContext::NumerotationContext(){
+}
+
+/**
+ * Constructor from xml
+ */
+NumerotationContext::NumerotationContext(QDomElement &e) {
+	fromXML(e);
+}
 
 /**
  * @brief NumerotationContext::clear, clear the content
@@ -64,6 +78,14 @@ int NumerotationContext::size() const {
 	return (content_.size());
 }
 
+/**
+ * @brief NumerotationContext::isEmpty
+ * @return true if numerotation contet is empty
+ */
+bool NumerotationContext::isEmpty() const {
+	if (content_.size() > 0) return false;
+	return true;
+}
 /**
  * @brief NumerotationContext::itemAt
  * @return the content at position @i 1:type 2:value 3:increase
@@ -103,3 +125,29 @@ bool NumerotationContext::keyIsAcceptable(const QString &type) const {
 bool NumerotationContext::keyIsNumber(const QString &type) const {
 	return (type.contains(QRegExp(validRegExpNumber())));
 }
+
+/**
+ * @brief NumerotationContext::toXML
+ * Save the numerotation context in a QDomElement under the element name @str
+ */
+QDomElement NumerotationContext::toXML(QDomDocument &d, QString str) {
+	QDomElement num_auto = d.createElement(str);
+	for (int i=0; i<content_.size(); ++i) {
+		QStringList strl = itemAt(i);
+		QDomElement part = d.createElement("part");
+		part.setAttribute("type", strl.at(0));
+		part.setAttribute("value", strl.at(1));
+		part.setAttribute("increase", strl.at(2));
+		num_auto.appendChild(part);
+	}
+	return num_auto;
+}
+
+/**
+ * @brief NumerotationContext::fromXML
+ * load numerotation context from @e
+ */
+void NumerotationContext::fromXML(QDomElement &e) {
+	clear();
+	foreach(QDomElement qde, QET::findInDomElement(e, "part")) addValue(qde.attribute("type"), qde.attribute("value"), qde.attribute("increase").toInt());
+}
diff --git a/sources/numerotationcontext.h b/sources/numerotationcontext.h
index c1a31917b..b1598c99d 100644
--- a/sources/numerotationcontext.h
+++ b/sources/numerotationcontext.h
@@ -20,6 +20,8 @@
 
 #include <QStringList>
 #include <QVariant>
+#include <QDomElement>
+
 /**
 	This class represents a numerotation context, i.e. the data (type, value, increase)
 	of a numerotation at a given time. It is notably used by conductor
@@ -28,16 +30,21 @@
 class NumerotationContext
 {
 	public:
+	NumerotationContext ();
+	NumerotationContext (QDomElement &);
 	void clear();
 	bool addValue(const QString &, const QVariant & = QVariant(1), const int = 1);
 	QString operator[] (const int &) const;
 	void operator << (const NumerotationContext &);
 	int size() const;
+	bool isEmpty() const;
 	QStringList itemAt(const int) const;
 	QString validRegExpNum () const;
 	QString validRegExpNumber() const;
 	bool keyIsAcceptable (const QString &) const;
 	bool keyIsNumber(const QString &) const;
+	QDomElement toXML(QDomDocument &, QString);
+	void fromXML(QDomElement &);
 
 	private:
 	QStringList content_;