More complete Schema

README.md

@@ -4,15 +4,56 @@
 
 ```mermaid
 ---
-title: Biblio4 Schema Example
+title: Biblio4 Schema
 ---
 erDiagram
-    BOOK }o--|{ USER : read_by
     USER ||--o{ COLLECTIONS : owns
+    USER {
+        string username PK
+        secret password_hash
+    }
+    COLLECTIONS }o--o{ PHYSICAL_BOOK : are_composed_of
+    COLLECTIONS {
+        uuid id PK
+        bool isTheMainCollection
+        string name
+        string owner PK, FK
+    }
+    USER ||--o{ ACCESS_KEYS : has
+    COLLECTIONS ||--o{ ACCESS_KEYS : has
+    ACCESS_KEYS {
+        uuid id PK
+        uuid collection_id PK, FK
+        string user_id PK, FK
+        rights rights
+        date expiration_date
+    }
+    BOOK {
+        string isbn PK
+    }
     REVIEW }o--|| BOOK : review_of
     REVIEW }o--|| USER : review_by
-    COLLECTIONS }o--o{ BOOK : are_composed_of
-    BOOK {
-        string isbn
+    REVIEW {
+        bool read
+        int rating
+        string notes
+    }
+    PHYSICAL_BOOK }o--|| BOOK : is_a
+    PHYSICAL_BOOK {
+        uuid id PK
+        any sticked_label
+        string isbn PK, FK
+        uuid[] collections_ids FK
+    }
+    PHYSICAL_BOOK ||--o{ LENDING : is_lended
+    USER ||--o{ LENDING : is_borrower
+    USER ||--o{ LENDING : is_lender
+    LENDING {
+        uuid id PK
+        uuid physical_book_id PK, FK
+        string borrower_id PK, FK
+        string lender_id PK, FK
+        date start_date
+        date end_date
     }
 ```