diff --git a/Documentation/Diagrammes_de_seq/changerSonAvatar.mdj b/Documentation/Diagrammes_de_seq/changerSonAvatar.mdj
new file mode 100644
index 0000000..e661b06
--- /dev/null
+++ b/Documentation/Diagrammes_de_seq/changerSonAvatar.mdj
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diff --git a/Documentation/Diagrammes_de_seq/créerUnGroupe.mdj b/Documentation/Diagrammes_de_seq/créerUnGroupe.mdj
new file mode 100644
index 0000000..2cb0df5
--- /dev/null
+++ b/Documentation/Diagrammes_de_seq/créerUnGroupe.mdj
@@ -0,0 +1,1556 @@
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+								"$ref": "AAAAAAGDxnSVo2HdwoA="
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+								"$ref": "AAAAAAGDxnSVo2HdwoA="
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+							"_parent": {
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+								"$ref": "AAAAAAGDxnTYdmIN6FU="
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+							"_id": "AAAAAAGDxnz1EGLz6fQ=",
+							"_parent": {
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+							"_parent": {
+								"$ref": "AAAAAAGDxnSVo2HdwoA="
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+							"name": "Utilisateur",
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+							"_parent": {
+								"$ref": "AAAAAAGDxnSVo2HdwoA="
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+							"_parent": {
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+								"$ref": "AAAAAAGDxnTCI2HtXvo="
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+					"_id": "AAAAAAGDxnTCI2HszAY=",
+					"_parent": {
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+					"name": "Role1"
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+}
\ No newline at end of file
diff --git a/Documentation/Diagrammes_de_seq/modifierSesRéglages.mdj b/Documentation/Diagrammes_de_seq/modifierSesRéglages.mdj
new file mode 100644
index 0000000..986cae9
--- /dev/null
+++ b/Documentation/Diagrammes_de_seq/modifierSesRéglages.mdj
@@ -0,0 +1,3168 @@
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index 0000000..fca2c75
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+								"$ref": "AAAAAAGDxmw8hVGLhek="
+							},
+							"name": "Envoyer le message",
+							"source": {
+								"$ref": "AAAAAAGDxmz20VGbaLA="
+							},
+							"target": {
+								"$ref": "AAAAAAGDxm0QV1G78DI="
+							}
+						},
+						{
+							"_type": "UMLMessage",
+							"_id": "AAAAAAGDxnEp81KB7w8=",
+							"_parent": {
+								"$ref": "AAAAAAGDxmw8hVGLhek="
+							},
+							"name": "Notifier l'ami d'un nouveau  message",
+							"source": {
+								"$ref": "AAAAAAGDxm0QV1G78DI="
+							},
+							"target": {
+								"$ref": "AAAAAAGDxm0QV1G78DI="
+							}
+						},
+						{
+							"_type": "UMLMessage",
+							"_id": "AAAAAAGDxnBqilJoLtw=",
+							"_parent": {
+								"$ref": "AAAAAAGDxmw8hVGLhek="
+							},
+							"name": "Afficher le message envoyé à la suite de la discussion",
+							"source": {
+								"$ref": "AAAAAAGDxm0QV1G78DI="
+							},
+							"target": {
+								"$ref": "AAAAAAGDxmz20VGbaLA="
+							},
+							"messageSort": "reply"
+						}
+					],
+					"participants": [
+						{
+							"_type": "UMLLifeline",
+							"_id": "AAAAAAGDxmz20VGbaLA=",
+							"_parent": {
+								"$ref": "AAAAAAGDxmw8hVGLhek="
+							},
+							"name": "Utilisateur",
+							"represent": {
+								"$ref": "AAAAAAGDxmz20VGa8Ns="
+							},
+							"isMultiInstance": false
+						},
+						{
+							"_type": "UMLLifeline",
+							"_id": "AAAAAAGDxm0QV1G78DI=",
+							"_parent": {
+								"$ref": "AAAAAAGDxmw8hVGLhek="
+							},
+							"name": "Application",
+							"represent": {
+								"$ref": "AAAAAAGDxm0QVlG6Ops="
+							},
+							"isMultiInstance": false
+						}
+					],
+					"fragments": [
+						{
+							"_type": "UMLStateInvariant",
+							"_id": "AAAAAAGDxm2wblHrswg=",
+							"_parent": {
+								"$ref": "AAAAAAGDxmw8hVGLhek="
+							},
+							"name": "StateInvariant1",
+							"covered": {
+								"$ref": "AAAAAAGDxmz20VGbaLA="
+							},
+							"invariant": "Être connecté"
+						}
+					]
+				}
+			],
+			"attributes": [
+				{
+					"_type": "UMLAttribute",
+					"_id": "AAAAAAGDxmz20VGa8Ns=",
+					"_parent": {
+						"$ref": "AAAAAAGDxmw8hFGKKRs="
+					},
+					"name": "Role1"
+				},
+				{
+					"_type": "UMLAttribute",
+					"_id": "AAAAAAGDxm0QVlG6Ops=",
+					"_parent": {
+						"$ref": "AAAAAAGDxmw8hFGKKRs="
+					},
+					"name": "Role2"
+				}
+			]
+		}
+	]
+}
\ No newline at end of file