From 7c9a64bc31956d47074e5c96e51cc767e97c5a6c Mon Sep 17 00:00:00 2001
From: Wilson Lin <contact@wilsonl.in>
Date: Thu, 5 Jul 2018 23:58:12 +1200
Subject: [PATCH] Tag omission notes

---
 notes/parsing/tag-omission.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 notes/parsing/tag-omission.md

diff --git a/notes/parsing/tag-omission.md b/notes/parsing/tag-omission.md
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+# Tag omission
+
+|Tag name|Details|
+|---|---|
+|`li`| The end tag can be omitted if the list item is immediately followed by another `<li>` element, or if there is no more content in its parent element.|
+|`p`| The start tag is required. The end tag may be omitted if the `<p>` element is immediately followed by an `<address>`, `<article>`, `<aside>`, `<blockquote>`, `<div>`, `<dl>`, `<fieldset>`, `<footer>`, `<form>`, `<h1>`, `<h2>`, `<h3>`, `<h4>`, `<h5>`, `<h6>`, `<header>`, `<hr>`, `<menu>`, `<nav>`, `<ol>`, `<pre>`, `<section>`, `<table>`, `<ul>` or another `<p>` element, or if there is no more content in the parent element and the parent element is not an `<a>` element.|
+|`rp`| The end tag can be omitted if the element is immediately followed by an `<rt>` or another `<rp>` element, or if there is no more content in the parent element.|
+|`rt`| The end tag may be omitted if the `<rt>` element is immediately followed by an `<rt>` or `<rp>` element, or if there is no more content in the parent element.|
+|`rtc`| The closing tag can be omitted if it is immediately followed by a `<rb>`, `<rtc>` or `<rt>` element opening tag or by its parent closing tag.|
+|`caption`| The end tag can be omitted if the element is not immediately followed by ASCII whitespace or a comment.|
+|`colgroup`| The start tag may be omitted, if it has a `<col>` element as its first child and if it is not preceded by a `<colgroup>` whose end tag has been omitted. The end tag may be omitted, if it is not followed by a space or a comment.|
+|`tbody`| The `<tbody>` element is not a required child element for a parent `<table>` element to graphically render. However, it must not be present, if its parent `<table>` element has a `<tr>` element as a child.|
+|`td`| The start tag is mandatory. The end tag may be omitted, if it is immediately followed by a `<th>` or `<td>` element or if there are no more data in its parent element.|
+|`tfoot`|The start tag is mandatory. The end tag may be omitted if there is no more content in the parent `<table>` element.|
+|`th`|The start tag is mandatory. The end tag may be omitted, if it is immediately followed by a `<th>` or `<td>` element or if there are no more data in its parent element.|
+|`thead`|The start tag is mandatory. The end tag may be omitted if the `<thead>` element is immediately followed by a `<tbody>` or `<tfoot>` element.|
+|`tr`|Start tag is mandatory. End tag may be omitted if the `<tr>` element is immediately followed by a `<tr>` element, or if the row is the last element in its parent table group (`<thead>`, `<tbody>` or `<tfoot>`) element.|
+|`optgroup`|The start tag is mandatory. The end tag is optional if this element is immediately followed by another `<optgroup>` element, or if the parent element has no more content.|
+|`option`|The start tag is mandatory. The end tag is optional if this element is immediately followed by another `<option>` element or an `<optgroup>`, or if the parent element has no more content.|