diff --git a/banque.md b/banque.md
index 347c5bd..98b69d0 100644
--- a/banque.md
+++ b/banque.md
@@ -89,8 +89,8 @@ erDiagram
 
   %% Relations
 
-  person  ||--|| holder :
-  company ||--|| holder :
+  person  ||--|| holder : is
+  company ||--|| holder : is
 ```
 
 ## 2. Les comptes
@@ -196,16 +196,16 @@ erDiagram
 
   %% Relations
 
-  person  ||--|| holder :
-  company ||--|| holder :
-  bank    ||--|| holder :
-  holder  }|--|{ account_holder :
-  account_holder }|--|{ account :
-  currency ||--|{ account :
-  exchange_rate }o--|| currency :
-  transaction }o--|| operation :
-  operation }o--|| account :
-  operation }o--|| account :
+  person  ||--|| holder : a
+  company ||--|| holder : a
+  bank    ||--|| holder : a
+  holder  }|--|{ account_holder : a
+  account_holder }|--|{ account : a
+  currency ||--|{ account : a
+  exchange_rate }o--|| currency : a
+  transaction }o--|| operation : a
+  operation }o--|| account : a
+  operation }o--|| account : a
 ```
 
 ## 4. Procédure stockée