diff --git a/Documents/proto/messaging_extension/Makefile b/Documents/proto/messaging_extension/Makefile
index 99759d4..cf0e6b4 100644
--- a/Documents/proto/messaging_extension/Makefile
+++ b/Documents/proto/messaging_extension/Makefile
@@ -1,4 +1,4 @@
-.PHONY: all clean run
+.PHONY: all clean run image
 
 all: extension_messagerie.pdf
 
@@ -11,6 +11,9 @@ extension_messagerie.pdf:use_case_messagerie.tex extension_messagerie.bbl extens
 use_case_messagerie.tex: use_case_messagerie.uml
 	plantuml -tlatex:nopreamble use_case_messagerie.uml
 
+image: use_case_messagerie.uml interaction_diagram.uml
+	plantuml $^ 
+
 extension_messagerie.bbl: extension_messagerie.bcf
 	biber extension_messagerie
 
diff --git a/Documents/proto/messaging_extension/interaction_diagram.uml b/Documents/proto/messaging_extension/interaction_diagram.uml
new file mode 100644
index 0000000..cfb2254
--- /dev/null
+++ b/Documents/proto/messaging_extension/interaction_diagram.uml
@@ -0,0 +1,47 @@
+@startuml
+note
+	Appointment
+endnote
+start
+:Asking Apointment]
+repeat
+if (accepted) is (yes) then
+	:Export to calendar]
+	stop
+else (no)
+	:Propose new apointment]
+endif
+	
+@enduml
+
+@startuml
+note
+	Messaging
+endnote
+start
+split 
+	:Create Discution]
+	:Choose users]
+split again
+	:Message one users]
+endsplit
+repeat :send Message]
+repeat while
+stop
+@enduml
+
+@startuml
+note 
+	Forum
+endnote
+
+start
+:Forum Creation]
+
+repeat
+:Topic Creation]
+:Topic Answering]
+
+repeat while
+stop
+@enduml