diff --git a/exml/EXmlAttribute.cpp b/exml/EXmlAttribute.cpp
index a306dc5..6da20bc 100644
--- a/exml/EXmlAttribute.cpp
+++ b/exml/EXmlAttribute.cpp
@@ -95,7 +95,7 @@ bool exml::EXmlAttribute::Parse(const etk::UString& _data, int32_t& _pos, bool _
 	return true;
 }
 
-bool exml::EXmlAttribute::Generate(etk::UString& _data, int32_t _indent)
+bool exml::EXmlAttribute::Generate(etk::UString& _data, int32_t _indent) const
 {
 	_data += " ";
 	_data += m_name;
diff --git a/exml/EXmlAttribute.h b/exml/EXmlAttribute.h
index 3446f64..1c97f35 100644
--- a/exml/EXmlAttribute.h
+++ b/exml/EXmlAttribute.h
@@ -20,14 +20,16 @@ namespace exml
 			EXmlAttribute(void) { };
 			EXmlAttribute(const etk::UString& _name, const etk::UString& _value);
 			virtual ~EXmlAttribute(void) { };
-			virtual nodeType_te GetType(void) { return exml::typeAttribute; };
+			virtual nodeType_te GetType(void) const { return exml::typeAttribute; };
 			virtual bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos);
-			virtual bool Generate(etk::UString& _data, int32_t _indent);
+			virtual bool Generate(etk::UString& _data, int32_t _indent) const;
 		protected:
 			etk::UString m_name;
 		public:
 			virtual void SetName(etk::UString _name) { m_name = _name; };
-			virtual const etk::UString& GetName(void) { return m_name; };
+			virtual const etk::UString& GetName(void) const { return m_name; };
+			virtual operator exml::EXmlAttribute* () { return this; };
+			virtual operator const exml::EXmlAttribute* () const { return this; };
 	};
 };
 
diff --git a/exml/EXmlComment.cpp b/exml/EXmlComment.cpp
index bd37c22..6fb6445 100644
--- a/exml/EXmlComment.cpp
+++ b/exml/EXmlComment.cpp
@@ -35,7 +35,7 @@ bool exml::EXmlComment::Parse(const etk::UString& _data, int32_t& _pos, bool _ca
 	return false;
 }
 
-bool exml::EXmlComment::Generate(etk::UString& _data, int32_t _indent)
+bool exml::EXmlComment::Generate(etk::UString& _data, int32_t _indent) const
 {
 	AddIndent(_data, _indent);
 	_data += "<!--";
diff --git a/exml/EXmlComment.h b/exml/EXmlComment.h
index 38fd195..fe418de 100644
--- a/exml/EXmlComment.h
+++ b/exml/EXmlComment.h
@@ -19,9 +19,11 @@ namespace exml
 		public:
 			EXmlComment(void) { };
 			virtual ~EXmlComment(void) { };
-			virtual nodeType_te GetType(void) { return typeAttribute; };
+			virtual nodeType_te GetType(void) const { return typeAttribute; };
 			virtual bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos);
-			virtual bool Generate(etk::UString& _data, int32_t _indent);
+			virtual bool Generate(etk::UString& _data, int32_t _indent) const;
+			virtual operator exml::EXmlComment* () { return this; };
+			virtual operator const exml::EXmlComment* () const { return this; };
 	};
 };
 
diff --git a/exml/EXmlDeclaration.cpp b/exml/EXmlDeclaration.cpp
index a2f2198..bcd3f00 100644
--- a/exml/EXmlDeclaration.cpp
+++ b/exml/EXmlDeclaration.cpp
@@ -9,15 +9,17 @@
 #include <exml/EXmlDeclaration.h>
 #include <exml/debug.h>
 
-bool exml::EXmlDeclaration::Generate(etk::UString& _data, int32_t _indent)
+bool exml::EXmlDeclaration::Generate(etk::UString& _data, int32_t _indent) const
 {
 	AddIndent(_data, _indent);
 	_data += "<?";
-	_data += m_name;
+	_data += m_value;
+	/*
 	if (m_value.Size()!=0) {
 		_data += " ";
 		_data += m_value;
 	}
+	*/
 	_data += "?>\n";
 	return true;
 }
diff --git a/exml/EXmlDeclaration.h b/exml/EXmlDeclaration.h
index b2a4f27..003021b 100644
--- a/exml/EXmlDeclaration.h
+++ b/exml/EXmlDeclaration.h
@@ -19,10 +19,11 @@ namespace exml
 		public:
 			EXmlDeclaration(void) { };
 			virtual ~EXmlDeclaration(void) { };
-			virtual nodeType_te GetType(void) { return typeAttribute; };
-			virtual bool Generate(etk::UString& _data, int32_t _indent);
+			virtual nodeType_te GetType(void) const { return typeAttribute; };
+			virtual bool Generate(etk::UString& _data, int32_t _indent) const;
 			virtual bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos);
-			
+			virtual operator exml::EXmlDeclaration* () { return this; };
+			virtual operator const exml::EXmlDeclaration* () const { return this; };
 	};
 };
 
diff --git a/exml/EXmlDocument.cpp b/exml/EXmlDocument.cpp
index d1d2cd2..fb3db3c 100644
--- a/exml/EXmlDocument.cpp
+++ b/exml/EXmlDocument.cpp
@@ -18,7 +18,7 @@ exml::EXmlDocument::EXmlDocument(void) :
 }
 
 
-bool exml::EXmlDocument::Generate(etk::UString& _data, int32_t _indent)
+bool exml::EXmlDocument::Generate(etk::UString& _data, int32_t _indent) const
 {
 	for (int32_t iii=0; iii<m_listSub.Size(); iii++) {
 		if (NULL!=m_listSub[iii]) {
diff --git a/exml/EXmlDocument.h b/exml/EXmlDocument.h
index abcdd16..7579eb9 100644
--- a/exml/EXmlDocument.h
+++ b/exml/EXmlDocument.h
@@ -20,17 +20,17 @@ namespace exml
 		public:
 			EXmlDocument(void);
 			virtual ~EXmlDocument(void) { };
-			virtual nodeType_te GetType(void) { return typeDocument; };
+			virtual nodeType_te GetType(void) const { return typeDocument; };
 		private:
 			unicode::charset_te m_charset;
 		public:
 			virtual void SetCharset(unicode::charset_te _charset) { m_charset = _charset; };
-			virtual unicode::charset_te GetCharset(void) { return m_charset; };
+			virtual unicode::charset_te GetCharset(void) const { return m_charset; };
 		private:
 			bool m_caseSensitive;
 		public:
 			virtual void SetCaseSensitive(bool _val) { m_caseSensitive = _val; };
-			virtual bool GetCaseSensitive(void) { return m_caseSensitive; };
+			virtual bool GetCaseSensitive(void) const { return m_caseSensitive; };
 		public:
 			/**
 			 * @brief Parse a string that contain an XML
@@ -63,7 +63,9 @@ namespace exml
 			
 			void Display(void);
 			bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos);
-			bool Generate(etk::UString& _data, int32_t _indent);
+			bool Generate(etk::UString& _data, int32_t _indent) const;
+			virtual operator exml::EXmlDocument* () { return this; };
+			virtual operator const exml::EXmlDocument* () const { return this; };
 	};
 };
 
diff --git a/exml/EXmlElement.cpp b/exml/EXmlElement.cpp
index e7112cf..3fdb184 100644
--- a/exml/EXmlElement.cpp
+++ b/exml/EXmlElement.cpp
@@ -22,6 +22,14 @@ exml::EXmlNode* exml::EXmlElement::GetSub(int32_t _id)
 	return m_listSub[_id];
 }
 
+const exml::EXmlNode* exml::EXmlElement::GetSub(int32_t _id) const
+{
+	if (_id <0 || _id>m_listSub.Size()) {
+		return NULL;
+	}
+	return m_listSub[_id];
+}
+
 void exml::EXmlElement::AppendSub(exml::EXmlNode* _node)
 {
 	if (_node == NULL) {
@@ -51,8 +59,29 @@ exml::EXmlNode* exml::EXmlElement::GetNode(const etk::UString& _name)
 	}
 	return NULL;
 }
+const exml::EXmlNode* exml::EXmlElement::GetNode(const etk::UString& _name) const
+{
+	if (_name.Size()==0) {
+		return NULL;
+	}
+	for (int32_t iii=0; iii<m_listSub.Size(); iii++) {
+		if(    NULL != m_listSub[iii]
+		    && m_listSub[iii]->GetType() == exml::typeElement
+		    && m_listSub[iii]->GetValue() == _name) {
+			return m_listSub[iii];
+		}
+	}
+	return NULL;
+}
 
-exml::EXmlAttribute* exml::EXmlElement::GetAttribute(int32_t _id)
+exml::EXmlAttribute* exml::EXmlElement::GetAttr(int32_t _id)
+{
+	if (_id <0 || _id>m_listAttribute.Size()) {
+		return NULL;
+	}
+	return m_listAttribute[_id];
+}
+const exml::EXmlAttribute* exml::EXmlElement::GetAttr(int32_t _id) const
 {
 	if (_id <0 || _id>m_listAttribute.Size()) {
 		return NULL;
@@ -74,9 +103,9 @@ void exml::EXmlElement::AppendAttribute(exml::EXmlAttribute* _node)
 	m_listAttribute.PushBack(_node);
 }
 
-const etk::UString& exml::EXmlElement::GetAttribute(const etk::UString& _name)
+const etk::UString& exml::EXmlElement::GetAttribute(const etk::UString& _name) const
 {
-	static const etk::Ustring errorReturn("");
+	static const etk::UString errorReturn("");
 	if (_name.Size()==0) {
 		return errorReturn;
 	}
@@ -89,11 +118,11 @@ const etk::UString& exml::EXmlElement::GetAttribute(const etk::UString& _name)
 	return errorReturn;
 }
 
-bool exml::EXmlElement::Generate(etk::UString& _data, int32_t _indent)
+bool exml::EXmlElement::Generate(etk::UString& _data, int32_t _indent) const
 {
 	AddIndent(_data, _indent);
 	_data += "<";
-	_data += m_name;
+	_data += m_value;
 	for (int32_t iii=0; iii<m_listAttribute.Size(); iii++) {
 		if (NULL!=m_listAttribute[iii]) {
 			m_listAttribute[iii]->Generate(_data, _indent);
@@ -118,7 +147,7 @@ bool exml::EXmlElement::Generate(etk::UString& _data, int32_t _indent)
 			AddIndent(_data, _indent);
 		}
 		_data += "</";
-		_data += m_name;
+		_data += m_value;
 		_data += ">\n";
 	} else {
 		_data += "/>\n";
@@ -255,7 +284,7 @@ bool exml::EXmlElement::SubParse(const etk::UString& _data, int32_t& _pos, bool
 						}
 					}
 				} else {
-					EXML_ERROR(_filePos << " ==> end node error : '" << tmpname << "' != '" << m_name << "'");
+					EXML_ERROR(_filePos << " ==> end node error : '" << tmpname << "' != '" << m_value << "'");
 					return false;
 				}
 			}
@@ -334,7 +363,7 @@ bool exml::EXmlElement::SubParse(const etk::UString& _data, int32_t& _pos, bool
 
 bool exml::EXmlElement::Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos)
 {
-	EXML_DEBUG("start parse : 'element' named='" << m_name << "'");
+	EXML_DEBUG("start parse : 'element' named='" << m_value << "'");
 	// note : When start parsing the upper element must have set the value of the element and set the position after this one
 	
 	// find a normal node ...
diff --git a/exml/EXmlElement.h b/exml/EXmlElement.h
index 6374c27..80d8c9d 100644
--- a/exml/EXmlElement.h
+++ b/exml/EXmlElement.h
@@ -21,26 +21,31 @@ namespace exml
 			EXmlElement(void) { };
 			EXmlElement(const etk::UString& _value) : exml::EXmlNode(_value) { };
 			virtual ~EXmlElement(void) { };
-			virtual nodeType_te GetType(void) { return typeElement; };
+			virtual nodeType_te GetType(void) const { return typeElement; };
 		protected:
 			etk::Vector<exml::EXmlNode*> m_listSub;
 		public:
 			int32_t SizeSub(void) const { return m_listSub.Size(); };
-			EXmlNode* GetSub(int32_t _id);
 			void AppendSub(EXmlNode* _node);
+			EXmlNode* GetSub(int32_t _id);
+			const EXmlNode* GetSub(int32_t _id) const;
+			EXmlNode* GetNode(const etk::UString& _name);
+			const EXmlNode* GetNode(const etk::UString& _name) const;
 		protected:
 			etk::Vector<exml::EXmlAttribute*> m_listAttribute;
 		public:
 			int32_t SizeAttribute(void) const { return m_listSub.Size(); };
-			EXmlAttribute* GetAttribute(int32_t _id);
 			void AppendAttribute(EXmlAttribute* _node);
+			EXmlAttribute* GetAttr(int32_t _id);
+			const EXmlAttribute* GetAttr(int32_t _id) const;
+			const etk::UString& GetAttribute(const etk::UString& _name) const;
 		public:
 			virtual bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos);
-			virtual bool Generate(etk::UString& _data, int32_t _indent);
+			virtual bool Generate(etk::UString& _data, int32_t _indent) const;
 		protected:
 			bool SubParse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos, bool _mainNode=false);
-			
-			const etk::UString& GetAttribute(const etk::UString& _name);
+			virtual operator exml::EXmlElement* () { return this; };
+			virtual operator const exml::EXmlElement* () const { return this; };
 	};
 };
 
diff --git a/exml/EXmlNode.cpp b/exml/EXmlNode.cpp
index ab3e0f2..ec09d00 100644
--- a/exml/EXmlNode.cpp
+++ b/exml/EXmlNode.cpp
@@ -11,19 +11,20 @@
 
 
 exml::EXmlNode::EXmlNode(const etk::UString& _value) :
+	m_pos(0,0),
 	m_value(_value)
 {
 	
 }
 
-void exml::EXmlNode::AddIndent(etk::UString& _data, int32_t _indent)
+void exml::EXmlNode::AddIndent(etk::UString& _data, int32_t _indent) const
 {
 	for (int32_t iii=0; iii<_indent; iii++) {
 		_data+="\t";
 	}
 }
 
-void exml::EXmlNode::DrawElementParsed(const etk::UniChar& _val, const ivec2& _filePos)
+void exml::EXmlNode::DrawElementParsed(const etk::UniChar& _val, const ivec2& _filePos) const
 {
 	if (_val=='\n') {
 		EXML_DEBUG(_filePos << " Parse '\\n'");
@@ -36,7 +37,7 @@ void exml::EXmlNode::DrawElementParsed(const etk::UniChar& _val, const ivec2& _f
 
 
 // !"#$%&'()*+,/;<=>?@[\]^`{|}~ ou une espace et ne peut pas commencer par -. ou un chiffre.
-bool exml::EXmlNode::CheckAvaillable(const etk::UniChar& _val, bool _firstChar)
+bool exml::EXmlNode::CheckAvaillable(const etk::UniChar& _val, bool _firstChar) const
 {
 	if(    _val == '!'
 	    || _val == '"'
@@ -83,7 +84,7 @@ bool exml::EXmlNode::CheckAvaillable(const etk::UniChar& _val, bool _firstChar)
 	return true;
 }
 
-int32_t exml::EXmlNode::CountWhiteChar(const etk::UString& _data, int32_t _pos)
+int32_t exml::EXmlNode::CountWhiteChar(const etk::UString& _data, int32_t _pos) const
 {
 	int32_t white=0;
 	for (int32_t iii=_pos; iii<_data.Size(); iii++) {
@@ -99,62 +100,3 @@ int32_t exml::EXmlNode::CountWhiteChar(const etk::UString& _data, int32_t _pos)
 	return white;
 }
 
-
-			bool IsDocument(void) { return GetType()==exml::typeDocument; };
-			bool IsAttribute(void) { return GetType()==exml::typeAttribute; };
-			bool IsComment(void) { return GetType()==exml::typeComment; };
-			bool IsDeclaration(void) { return GetType()==exml::typeDeclaration; };
-			bool IsElement(void) { return GetType()==exml::typeElement; };
-			bool IsText(void) { return GetType()==exml::typeText; };
-
-
-exml::EXmlDocument* exml::EXmlNode::ToDocument(void)
-{
-	if (GetType()==exml::typeDocument) {
-		return static_cast<exml::*>(*this);
-	}
-	return NULL;
-}
-
-exml::EXmlAttribute* exml::EXmlNode::ToAttribute(void)
-{
-	if (GetType()==exml::typeDocument) {
-		return static_cast<exml::EXmlAttribute*>(*this);
-	}
-	return NULL;
-}
-
-exml::EXmlComment* exml::EXmlNode::ToComment(void)
-{
-	if (GetType()==exml::typeDocument) {
-		return static_cast<exml::EXmlComment*>(*this);
-	}
-	return NULL;
-}
-
-exml::EXmlDeclaration* exml::EXmlNode::ToDeclaration(void)
-{
-	if (GetType()==exml::typeDocument) {
-		return static_cast<exml::EXmlDeclaration*>(*this);
-	}
-	return NULL;
-}
-
-exml::EXmlElement* exml::EXmlNode::ToElement(void)
-{
-	if (GetType()==exml::typeDocument) {
-		return static_cast<exml::EXmlElement*>(*this);
-	}
-	return NULL;
-}
-
-exml::EXmlText* exml::EXmlNode::ToText(void)
-{
-	if (GetType()==exml::typeDocument) {
-		return static_cast<exml::EXmlText*>(*this);
-	}
-	return NULL;
-}
-
-
-
diff --git a/exml/EXmlNode.h b/exml/EXmlNode.h
index b3f318a..dafa737 100644
--- a/exml/EXmlNode.h
+++ b/exml/EXmlNode.h
@@ -35,42 +35,52 @@ namespace exml
 	class EXmlNode
 	{
 		public:
-			EXmlNode(void) { };
+			EXmlNode(void) : m_pos(0,0) { };
 			EXmlNode(const etk::UString& _value);
 			virtual ~EXmlNode(void) { };
 		protected:
-			void AddIndent(etk::UString& _data, int32_t _indent);
+			void AddIndent(etk::UString& _data, int32_t _indent) const;
 		public:
 			/**
 			 * Parse the sub nodes and current nodes ...
 			 */
 			virtual bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos) = 0;
-			virtual bool Generate(etk::UString& _data, int32_t _indent) { return true; };
+			virtual bool Generate(etk::UString& _data, int32_t _indent) const { return true; };
+		private:
+			ivec2 m_pos; // position in the readed file
+		public:
+			const ivec2& Pos(void) { return m_pos; };
 		protected:
 			etk::UString m_value;
 		public:
 			virtual void SetValue(etk::UString _value) { m_value = _value; };
-			virtual const etk::UString& GetValue(void) { return m_value; };
+			virtual const etk::UString& GetValue(void) const { return m_value; };
 		public:
-			virtual nodeType_te GetType(void) { return typeNode; };
+			virtual nodeType_te GetType(void) const { return typeNode; };
 		protected:
-			void DrawElementParsed(const etk::UniChar& _val, const ivec2& _firstChar);
-			bool CheckAvaillable(const etk::UniChar& _val, bool _firstChar);
-			int32_t CountWhiteChar(const etk::UString& _data, int32_t _pos);
+			void DrawElementParsed(const etk::UniChar& _val, const ivec2& _firstChar) const;
+			bool CheckAvaillable(const etk::UniChar& _val, bool _firstChar) const;
+			int32_t CountWhiteChar(const etk::UString& _data, int32_t _pos) const;
 		public:
-			exml::EXmlDocument* ToDocument(void);
-			exml::EXmlAttribute* ToAttribute(void);
-			exml::EXmlComment* ToComment(void);
-			exml::EXmlDeclaration* ToDeclaration(void);
-			exml::EXmlElement* ToElement(void);
-			exml::EXmlText* ToText(void);
+			virtual operator exml::EXmlDocument* () { return NULL; };
+			virtual operator const exml::EXmlDocument* () const { return NULL; };
+			virtual operator exml::EXmlAttribute* () { return NULL; };
+			virtual operator const exml::EXmlAttribute* () const { return NULL; };
+			virtual operator exml::EXmlComment* () { return NULL; };
+			virtual operator const exml::EXmlComment* () const { return NULL; };
+			virtual operator exml::EXmlDeclaration* () { return NULL; };
+			virtual operator const exml::EXmlDeclaration* () const { return NULL; };
+			virtual operator exml::EXmlElement* () { return NULL; };
+			virtual operator const exml::EXmlElement* () const { return NULL; };
+			virtual operator exml::EXmlText* () { return NULL; };
+			virtual operator const exml::EXmlText* () const{ return NULL; };
 			
-			bool IsDocument(void) { return GetType()==exml::typeDocument; };
-			bool IsAttribute(void) { return GetType()==exml::typeAttribute; };
-			bool IsComment(void) { return GetType()==exml::typeComment; };
-			bool IsDeclaration(void) { return GetType()==exml::typeDeclaration; };
-			bool IsElement(void) { return GetType()==exml::typeElement; };
-			bool IsText(void) { return GetType()==exml::typeText; };
+			bool IsDocument(void) const { return GetType()==exml::typeDocument; };
+			bool IsAttribute(void) const { return GetType()==exml::typeAttribute; };
+			bool IsComment(void) const { return GetType()==exml::typeComment; };
+			bool IsDeclaration(void) const { return GetType()==exml::typeDeclaration; };
+			bool IsElement(void) const { return GetType()==exml::typeElement; };
+			bool IsText(void) const { return GetType()==exml::typeText; };
 	};
 };
 
diff --git a/exml/EXmlText.cpp b/exml/EXmlText.cpp
index cc92318..b2407e7 100644
--- a/exml/EXmlText.cpp
+++ b/exml/EXmlText.cpp
@@ -9,13 +9,13 @@
 #include <exml/EXmlText.h>
 #include <exml/debug.h>
 
-bool exml::EXmlText::Generate(etk::UString& _data, int32_t _indent)
+bool exml::EXmlText::Generate(etk::UString& _data, int32_t _indent) const
 {
 	_data += m_value;
 	return true;
 }
 
-int32_t exml::EXmlText::CountLines(void)
+int32_t exml::EXmlText::CountLines(void) const
 {
 	int32_t count = 1;
 	for (int32_t iii=0; iii<m_value.Size(); iii++) {
diff --git a/exml/EXmlText.h b/exml/EXmlText.h
index f8c036a..5b611fc 100644
--- a/exml/EXmlText.h
+++ b/exml/EXmlText.h
@@ -19,10 +19,12 @@ namespace exml
 		public:
 			EXmlText(void) { };
 			virtual ~EXmlText(void) { };
-			virtual nodeType_te GetType(void) { return typeText; };
+			virtual nodeType_te GetType(void) const { return typeText; };
 			virtual bool Parse(const etk::UString& _data, int32_t& _pos, bool _caseSensitive, ivec2& _filePos);
-			virtual bool Generate(etk::UString& _data, int32_t _indent);
-			int32_t CountLines(void);
+			virtual bool Generate(etk::UString& _data, int32_t _indent) const;
+			int32_t CountLines(void) const;
+			virtual operator exml::EXmlText* () { return this; };
+			virtual operator const exml::EXmlText* () const { return this; };
 	};
 	class EXmlTextCDATA : public EXmlText
 	{