First version of explain. Creating a new parser was a wrong approach. Need to reimplement

src/sdp/readme.md

@@ -13,6 +13,7 @@
 - C : concept (with history management)
 - D : concept definitions (no history management)
 - R : executionContext ('R' stands for Result or ReturnValue, no history management)
+- V : variable (from pickle)
 
 ## How concepts are serialized ?
 - get the id of the concept
@@ -35,9 +36,9 @@ structure of the serialisation:
 ## Idea to manage ObjectSerializer
 Problem:  
 During serialization, there is no issue. The match() method is the unique way to get the correct serialier.  
-During the deserialisation, all Object serializer have type = '0' and version = 1.  
+During the deserialisation, all Object serializer have type = 'O' and version = 1.  
 So how to choose the correct one ?  
     A possible solution will be to add the type of the object to deserialize to the saved stream  
     --> SHA256 for every object. Too much data saved.  
 The id is to let to inc the version automatically in the Serialiser (during the registration) and to keep the mapping within sdp.state
-
+No, finally, I use a different char for each object type