<p>There are many rules for the Cangjie input method.
The one you don't understand thoroughly is the rule of omission.</p>

<blockquote>
  <p><a href="https://en.wikipedia.org/wiki/Cangjie_input_method" rel="noreferrer">Omission in enclosed forms</a>: when part of the character to be decomposed and the form is an enclosed form, only the shape of the enclosure is decomposed; the enclosed forms are omitted</p>
</blockquote>

<p>Take a look <a href="https://zh.wikibooks.org/w/index.php?title=%E5%80%89%E9%A0%A1%E8%BC%B8%E5%85%A5%E6%B3%95%2F%E5%8F%96%E7%A2%BC%E5%8E%9F%E5%89%87" rel="noreferrer">倉頡輸入法/取碼原則</a></p>

<blockquote>
  <p>2 省略大原則<br>
  2 The rule of omission</p>
  
  <p>2-2 包含省略：<br>
  2-2 Omission in enclosed forms:</p>
  
  <p>尾碼被「外框」字根包住，且「外框」尚未被取完時，以「外框」的尾碼取代之。<br>
  When the last code is enclosed by the frame radical and the codes of the frame are not completely taken yet, it is replaced by the last code of the frame.</p>
</blockquote>

<p><a href="https://i.sstatic.net/8y7ZH.png" rel="noreferrer"><img src="https://i.sstatic.net/8y7ZH.png" alt="enter image description here"></a></p>

<p><strong>The left and right ends of the "亠" protrude outward, therefore it is counted in the frame.</strong></p>

<p><a href="https://i.sstatic.net/TuSTQ.png" rel="noreferrer"><img src="https://i.sstatic.net/TuSTQ.png" alt="enter image description here"></a></p>

CC BY-SA 3.0
2017-10-13T21:52:44.377Z
2017-10-13T21:52:44.377Z
hinen
<p>Here are some Cangjie codes:</p>

<p>母 = WYI</p>

<p>每 = OWYI</p>

<p>海 = EOWY</p>

<p>I understand the first two.  The YI encodes 亠 and 丶 which makes sense.  Shouldn't 海 be EOWI instead of EOWY?  OWI would be the first, second, and last codes for 每 the same way a character like 語 (YRMMR) is decomposed.</p>

<input-methods>
Why is the Cangjie code for 海 inconsistent?
# Why is the Cangjie code for 海 inconsistent?

(Asked by: username_0 on 2017-10-13)

Here are some Cangjie codes:

母 = WYI

每 = OWYI

海 = EOWY

I understand the first two. The YI encodes 亠 and 丶 which makes sense. Shouldn't 海 be EOWI instead of EOWY? OWI would be the first, second, and last codes for 每 the same way a character like 語 (YRMMR) is decomposed.

**Tags:** input-methods


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## 1 answers

### Answer by username_1 on 2017-10-13. Score: 6 | Accepted answer

There are many rules for the Cangjie input method.
The one you don't understand thoroughly is the rule of omission.

> [Omission in enclosed forms](https://en.wikipedia.org/wiki/Cangjie_input_method): when part of the character to be decomposed and the form is an enclosed form, only the shape of the enclosure is decomposed; the enclosed forms are omitted

Take a look [倉頡輸入法/取碼原則](https://zh.wikibooks.org/w/index.php?title=%E5%80%89%E9%A0%A1%E8%BC%B8%E5%85%A5%E6%B3%95%2F%E5%8F%96%E7%A2%BC%E5%8E%9F%E5%89%87)

> 2 省略大原則  
> 2 The rule of omission
>
> 2-2 包含省略：  
> 2-2 Omission in enclosed forms:
>
> 尾碼被「外框」字根包住，且「外框」尚未被取完時，以「外框」的尾碼取代之。  
> When the last code is enclosed by the frame radical and the codes of the frame are not completely taken yet, it is replaced by the last code of the frame.

[![enter image description here](https://i.sstatic.net/8y7ZH.png)](https://i.sstatic.net/8y7ZH.png)

**The left and right ends of the "亠" protrude outward, therefore it is counted in the frame.**

[![enter image description here](https://i.sstatic.net/TuSTQ.png)](https://i.sstatic.net/TuSTQ.png)


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