# UML 統一碩模語言

###### tags: `UML`

> Note:

## :memo: Where do I start?

關係的強弱對比：泛化(generalization)=實現(realization)>組合>聚合>關聯>依賴

- dependency (use a): 若 class A 的方法需要傳入 object B，則稱為 class A 依賴 class B
- 箭頭由大指向小
- 

- association (has a): 若 class A 的屬性為object B，則稱為 class A 關聯 class B
- 箭頭由大指向小
- 

- aggregation (owns a):若 object A 的生命週期和 object B 無關
- 菱形指向大
- 

- composition (is a part of): 若 object B 會隨著 object A 而死亡，則class A 組合 class B
- 菱形指向大
- 
- inheritance (繼承, is a)
- implemenation/realization (實作, is like a)


1..* 表示個數至少一個
\* 表示個數為0以上

### Step 2:

### Step 3:

- [x] **Bold**
- [ ] *Italic*

:::info
:bulb: **Hint:**
:pushpin: **Remark:**

:::

> Note

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- Table

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- Code block with color and line numbers：

import pandas as pd