classDiagram
  Animal <|-- Dog
  Animal : +String name
  Dog : +bark() void
---
+---------------+    
| Animal        |    
+---------------+    
| +name: String |    
+---------------+    
        ^            
       --            
       |             
+-------------+      
| Dog         |      
+-------------+      
|             |      
+-------------+      
| +bark: void |      
+-------------+