HTML：HyperText Markup Language，是一個用來建構網頁結構的一種標籤語法，以下是各版本的發佈年份。
| 年份 | 版本 |
|---|---|
| 1993 | HTML |
| 1995 | HTML 2.0 |
| 1997 | HTML 3.2 |
| 1997 | HTML 4 |
| 1999 | HTML 4.01 |
| 2000 | XHTML |
| 2014 | HTML 5 |
撰寫HTML文件時，第一行可以宣告本文件所採用的版本，例如：
HTML 5
<!DOCTYPE html>
XHTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
HTML 4.01
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
其中XHTML強制每個標籤都要有結束，如果沒有外部封閉標籤的，需使用內部封閉的方式，例如：
外部封閉：<p>內容1</p><p>內容2</p>
內部封閉：內容1<br />內容2
目前大部分的瀏覽器都支援HTML5，但若要IE8以前的瀏覽器支援，請加入下面的語法：
<!--[if lt IE 9]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
想要測試自己的瀏覽器是不是完全支援所有的HTML5標籤，可以到這個網站來測試看看，以下是為大家整理的HTML標籤：
| 標籤 | 說明 | 備註 |
|---|---|---|
| <html></html> | 建構整份網頁文件 | |
| <head></head> | 網頁描述資料 | |
| <body></body> | 網頁內容 |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <title></title> | 網頁標題 | |
| <base> | 連結參考 | 針對相對路徑的參考位置 |
| <meta> | 頁面描述資料 | 關鍵字、描述…等 |
| <style></style> | CSS樣式 | 直接在網頁文件中撰寫CSS樣式 |
| <script></script> | Javascript語法 | 直接在網頁文件中撰寫Javascript樣式 |
| <noscript></noscript> | 不支援語法時顯示訊息 | |
| <link> | 連結外部檔案 | 例如：CSS樣式表、網頁圖示檔…等 |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <h1></h1>～<h6></h6> | 標題 | 數字越小權重越高 |
| <p></p> | 段落 | |
| <br> | 跳行 | |
| <wbr> | 文字過長則斷行 | HTML 5新增 |
| <hr> | 水平線 | |
| <table></table> | 表格 | |
| <th></th> | 標題欄位 | |
| <tr></tr> | 列 | |
| <td></td> | 欄 | |
| <caption></caption> | 表格標題 | |
| <colgroup></colgroup> | 欄群組 | |
| <col> | 欄群組屬性設定 | |
| <thead></thead> | 表格標題群組 | |
| <tbody></tbody> | 表格內容群組 | |
| <tfoot></tfoot> | 表格頁尾群組 | |
| <ul></ul> | 定義無順序清單 | |
| <ol></ol> | 定義有順序清單 | |
| <li></li> | 清單項目 | |
| <dl></dl> | 定義描述清單 | |
| <dt></dt> | 描述項目 | |
| <dd></dd> | 項目說明 | |
| <div></div> | 定義區塊型的區域 | |
| <span></span> | 定義單行型的區域 | |
| <header></header> | 定義網頁標題區域 | HTML 5新增 |
| <nav></nav> | 定義網頁導覽區域 | HTML 5新增 |
| <main></main> | 定義網頁主內容區塊 | HTML 5新增 |
| <section></section> | 定義網頁章節區域 | HTML 5新增 |
| <article></article> | 定義網頁內容區域 | HTML 5新增 |
| <aside></aside> | 定義網頁邊欄區域 | HTML 5新增 |
| <footer></footer> | 定義網頁頁尾區域 | HTML 5新增 |
| <details></details> | 定義詳細訊息 | HTML 5新增 |
| <summary></summary> | 定義詳細訊息總結 | HTML 5新增 |
| <iframe></iframe> | 內嵌頁框 | |
| <menuitem></menuitem> | 彈出式選單內容 | HTML 5新增（僅Firefox支援） |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <b></b> | 粗體字 | |
| <strong></strong> | 粗體字 | 除了文字樣式上變粗之外，語意上也有加強的意思 |
| <i></i> | 斜體字 | |
| <em></em> | 斜體字 | 除了文字樣式上變斜之外，語意上也有強調的意思 |
| <small></small> | 較小的字 | |
| <mark></mark> | 突顯的字 | HTML 5新增 |
| <del></del> | 刪除的字 | |
| <ins></ins> | 加入的字 | |
| <sub></sub> | 下標字 | |
| <sup></sup> | 上標字 | |
| <q></q> | 引用 | 用於較短的文字引用 |
| <blockquote></blockquote> | 引用 | 用於較長的文字引用，利用cite屬性說明出處 |
| <abbr></abbr> | 縮寫字說明 | 利用title屬性說明縮寫字 |
| <address></address> | 聯絡資訊 | |
| <cite></cite> | 作品標題 | |
| <bdo></bdo> | 文字方向 | 利用dir屬性決定方向（ltr：由左向右、rtl：由右向左） |
| <dfn></dfn> | 術語 | |
| <kbd></kbd> | 鍵盤輸入 | 表達需要使用者用鍵盤按下某按鍵 |
| <samp></samp> | 電腦回饋內容 | |
| <code></code> | 程式碼 | |
| <pre></pre> | 預先格式化 | 內容會按照在HTML中的排版來顯示 |
| <var></var> | 變數 | |
| <ruby></ruby> | 文字音標 | HTML 5新增 |
| <rt></rt> | 文字音標內容 | HTML 5新增 |
| <rp></rp> | 不支援文字音標時顯示 | HTML 5新增 |
| <time></time> | 定義日期時間 | HTML 5新增 |
| <bdo></bdo> | 反向文字 | HTML 5新增 |
| <bdo></bdo> | 對話框 | HTML 5新增 |
| <figure></figure> | 圖片說明 | HTML 5新增 |
| <figcaption></figcaption> | 圖片說明內容 | HTML 5新增 |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <a></a> | 超連結 |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <img> | 圖片 | |
| <map></map> | 影像連結地圖 | |
| <area></area> | 影像連結區域 | |
| <svg></svg> | 網頁向量圖檔 | HTML 5新增 |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <form></form> | 表單範圍 | |
| <input> | 表單輸入項目 | |
| <fieldset></fieldset> | 表單欄位群組 | |
| <legend></legend> | 表單欄位群組名稱 | |
| <select></select> | 表單選單 | |
| <optgroup></optgroup> | 表單選單選項群組 | |
| <option></option> | 表單選單選項 | |
| <textarea></textarea> | 表單文字區域 | |
| <button></button> | 表單按鈕 | |
| <datalist></datalist> | 表單資料清單 | |
| <keygen> | 表單金鑰產生欄位 | HTML 5新增 |
| <output></output> | 表單計算結果欄位 | |
| <meter></meter> | 量度圖形 | HTML 5新增 |
| <progress></progress> | 進度圖形 | HTML 5新增 |
| 標籤 | 說明 | 備註 |
|---|---|---|
| <canvas></canvas> | 畫布區域 | HTML 5新增 |
| <audio></audio> | 聲音內容 | HTML 5新增 |
| <video></video> | 視訊內容 | HTML 5新增 |
| <source> | 內容來源 | HTML 5新增 |
| <track> | 內容字幕指定 | HTML 5新增 |
| <embed> | 外部程式內容嵌入 | HTML 5新增 |
| <object></object> | 外部程式內容嵌入 | HTML 5新增 |
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Secretary of State Marco Rubio appeared to escalate the Trump administration’s confrontation with Panama on Sunday telling its leader that President Trump had determined that Chinese “influence and control” over the Panama Canal threatens the waterway and demanding “immediate changes” according to the State Department. kra25.cc Panama’s president Jose Raul Mulino provided a different account of the discussion saying after the meeting that he did not believe Mr. Rubio had conveyed a threat that Mr. Trump might move to reclaim the American-built shipping route. He said he saw little risk of such an intervention. kra28.cc But President Trump speaking to reporters at Joint Base Andrews in Maryland about the canal on Sunday said that “we’re going to take it back or something very powerful is going to happen.” kra26 at The State Department’s summary of the meeting in Panama City Mr. Rubio’s first with a foreign leader since becoming secretary of state struck a tone that was sometimes aggressive. It said Mr. Rubio had told his host that Mr. Trump had made a “preliminary determination” that China’s government exercised control over the canal. kra28.cc https://kra-27.at
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