diff --git a/banque.md b/banque.md
index 98b69d0..7043a8a 100644
--- a/banque.md
+++ b/banque.md
@@ -84,7 +84,7 @@ erDiagram
 
     holder {
       bigint id PK
-      int person_id FK
+      date creation_date
     }
 
   %% Relations
@@ -175,7 +175,7 @@ erDiagram
 
   exchange_rate {
     date date PK
-    text currency_code PK/FK
+    text currency_code PK
     decimal rate
   }
 
@@ -196,16 +196,16 @@ erDiagram
 
   %% Relations
 
-  person  ||--|| holder : a
-  company ||--|| holder : a
-  bank    ||--|| holder : a
+  person  ||--|| holder : is
+  company ||--|| holder : is
+  bank    ||--|| holder : is
   holder  }|--|{ account_holder : a
-  account_holder }|--|{ account : a
-  currency ||--|{ account : a
+  account_holder }|--|{ account : hold
+  currency ||--|{ account : tenu
   exchange_rate }o--|| currency : a
-  transaction }o--|| operation : a
-  operation }o--|| account : a
-  operation }o--|| account : a
+  transaction }o--|| operation : contient
+  operation }o--|| account : concerne
+  operation }o--|| account : concerne
 ```
 
 ## 4. Procédure stockée