diff --git a/include/dynamic-graph/entity-helper.h b/include/dynamic-graph/entity-helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..694910beb8ca30786d584d496c231fc9757f4e23
--- /dev/null
+++ b/include/dynamic-graph/entity-helper.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2011, Nicolas Mansard, LAAS-CNRS
+ *
+ * This file is part of sot-core.
+ * sot-core is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ * sot-core is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.  You should
+ * have received a copy of the GNU Lesser General Public License along
+ * with sot-core.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __sot_core_entity_helper_H__
+#define __sot_core_entity_helper_H__
+
+
+namespace dynamicgraph
+{
+
+  template< typename Ent >
+    struct EntityHelper
+    {
+      typedef Ent EntityClassName;
+      //static const std::string CLASS_NAME; TO BE ADDED IN DG DIRECTLY
+    };
+
+} // namespace dynamicgraph
+
+#endif // __sot_core_entity_helper_H__
diff --git a/include/dynamic-graph/signal-helper.h b/include/dynamic-graph/signal-helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..87bbec36668894eeadac415d152a569a0b747e00
--- /dev/null
+++ b/include/dynamic-graph/signal-helper.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2011, Nicolas Mansard, LAAS-CNRS
+ *
+ * This file is part of dynamic-graph.
+ * dynamic-graph is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ * dynamic-graph is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.  You should
+ * have received a copy of the GNU Lesser General Public License along
+ * with dynamic-graph.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __dynamic_graph_signal_helper_H__
+#define __dynamic_graph_signal_helper_H__
+
+/* --- COMMON INCLUDE -------------------------------------------------- */
+
+/* dg signals */
+#include <dynamic-graph/entity.h>
+#include <dynamic-graph/signal-ptr.h>
+#include <dynamic-graph/signal-time-dependent.h>
+
+/* --- MACROS ---------------------------------------------------------- */
+
+#define DECLARE_SIGNAL( name,IO,type )    ::dynamicgraph::Signal<type,int> name##S##IO
+#define CONSTRUCT_SIGNAL( name,IO,type )  name##S##IO( getClassName()+"("+getName()+")::"+#IO+"put("+#type+")::"+#name )
+
+#define DECLARE_SIGNAL_IN( name,type )    ::dynamicgraph::SignalPtr<type,int> name##SIN
+#define CONSTRUCT_SIGNAL_IN( name,type )  name##SIN( NULL,getClassName()+"("+getName()+")::input("+#type+")::"+#name )
+
+#define SIGNAL_OUT_FUNCTION( name )  name##SOUT_function
+#define DECLARE_SIGNAL_OUT( name,type )                         \
+  public:                                                       \
+    ::dynamicgraph::SignalTimeDependent<type,int> name##SOUT;	\
+  protected:                                                    \
+  type& SIGNAL_OUT_FUNCTION(name)( type&,int )
+#define CONSTRUCT_SIGNAL_OUT( name,type,dep )		\
+  name##SOUT( boost::bind(&  EntityClassName::name##SOUT_function,this,_1,_2), \
+	      dep,getClassName()+"("+getName()+")::output("+#type+")::"+#name )
+
+
+
+
+#endif // __dynamic_graph_signal_helper_H__