diff --git a/data-flow-diagram.md b/data-flow-diagram.md
index 6d4383f5..cbd9854e 100644
--- a/data-flow-diagram.md
+++ b/data-flow-diagram.md
@@ -32,8 +32,8 @@ graph TB
 
     %% ===== COUCHE 4 : PLATEFORME IoT =====
     subgraph IoT["🏠 COUCHE 4 : PLATEFORME IoT (OpenRemote)"]
-        OR[OpenRemote Manager<br/>Realm: Smart City<br/>33 assets IoT<br/>Port 8080]
-        KC[Keycloak<br/>Auth OpenID<br/>Token endpoint]
+        OPENREMOTE[OpenRemote Manager<br/>Realm: Smart City<br/>33 assets IoT<br/>Port 8080]
+        KEYCLOAK[Keycloak<br/>Auth OpenID<br/>Token endpoint]
     end
 
     %% ===== COUCHE 5 : STOCKAGE & MÉTRIQUES =====
@@ -59,7 +59,7 @@ graph TB
 
     %% Real sensors → Brokers + direct to OpenRemote
     SENSORS -->|MQTT| EMQX
-    SENSORS -.->|MQTT direct| OR
+    SENSORS -.->|MQTT direct| OPENREMOTE
 
     %% MQTT Brokers → Context Brokers
     EMQX -->|NGSI-LD| ORION
@@ -67,12 +67,12 @@ graph TB
     EMQX -->|SensorThings| FROST
 
     %% MQTT Brokers → OpenRemote (via MQTT Agent)
-    EMQX -->|MQTT (Agent)| OR
-    MOSQ -->|MQTT (Agent)| OR
-    BUNKER -->|MQTT (Agent)| OR
+    EMQX -->|MQTT (Agent)| OPENREMOTE
+    MOSQ -->|MQTT (Agent)| OPENREMOTE
+    BUNKER -->|MQTT (Agent)| OPENREMOTE
 
     %% OpenRemote → Keycloak
-    OR -.-> KC
+    OPENREMOTE -.-> KEYCLOAK
 
     %% Simulator → InfluxDB (direct)
     SIM -->|HTTP| INFLUX
@@ -91,13 +91,13 @@ graph TB
     GEO -->|WMS/WFS| MAP
 
     %% OpenRemote → Grafana
-    OR -->|API Query| GRAF
+    OPENREMOTE -->|API Query| GRAF
 
     %% All → Prometheus (Metrics)
     EMQX -.->|Metrics| PROM
     ORION -.->|Metrics| PROM
     STELLIO -.->|Metrics| PROM
-    OR -.->|Metrics| PROM
+    OPENREMOTE -.->|Metrics| PROM
 
     %% Style
     classDef simulator fill:#1e293b,stroke:#fb923c,stroke-width:2px,color:#fff
@@ -110,7 +110,7 @@ graph TB
     class SIM,SENSORS simulator
     class EMQX,MOSQ,BUNKER broker
     class ORION,STELLIO,FROST context
-    class OR,KC iot
+    class OPENREMOTE,KEYCLOAK iot
     class INFLUX,PROM,GEO storage
     class GRAF,MAP,ORUI viz
 ```