What Is CDATA in HTML Documents?

Q

What Is CDATA in HTML documents?

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A

CDATA stands for Character DATA, which is used to define a section of data that should not go through the XHTML entity translation (parsing) process. In other words, 3 special characters: "<", ">", and "&" can be directly used in CDATA. They will not be "parsed".

CDATA must starts with "<![CDATA[" and ends with "]]>". Here are some good examples:

  <![CDATA[Adam & Eve]]>
  <![CDATA[
    Sample XHTML code:
    <p>1</p>
    <p>1 1</p>
    <p>1 2 1</p>
    <p>1 3 3 1</p>
    <p>1 4 6 4 1</p>
  ]]>

⇒ What Is a Sub-element in HTML?

⇐ HTML Entities

⇑ Introduction of HTML Element Content Syntax

⇑⇑ HTML Tutorials

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HTML Entities
What Is an HTML Entity? An HTML entity is escape sequence used to represent a special character that is hard to enter via a normal keyboard. For example, you can not find a key on your keyboard to enter the copyright character, "©" directly. You need to use the HTML entity "&copy;" to repres... 2024-04-14, ∼3599🔥, 0💬

HTML Elements with PCDATA Contents
What Are the HTML Elements Defined with PCDATA Contents? The following HTML elements are defined to use the PCDATA content model: <title> - Element to provide a title to the document. <style> - Element to provide a CSS to the document. <script> - Element to ... 2024-04-14, ∼3273🔥, 0💬

HTML Elements with Mixed Contents
What Are the HTML Elements Defined with Mixed Contents? The following HTML elements are defined to use the mixed content model: <p> - Element to insert a paragraph. <pre> - Element to insert a pre-formatted text. <li> - Element to insert an item into a list.... 2024-04-14, ∼3234🔥, 0💬

HTML Elements with Sub-elements Contents
What Are the HTML Elements Defined with Sub-elements Contents? The following HTML elements are defined to use the sub-element content model: <html> - The root element of the document. <head> - Element to provide head information to the document. <ul> - Eleme... 2024-04-14, ∼3191🔥, 0💬

What Is a Sub-element in HTML?
What Is a Sub-element in HTML? A sub-element is an HTML element that is included inside the content of another HTML element. The inner element is called the sub-element or child element. The outer element is called the parent element. Together they are called nested elements. Note that which element... 2024-02-28, ∼2713🔥, 0💬

What Is CDATA in HTML Documents?
What Is CDATA in HTML documents? CDATA stands for Character DATA, which is used to define a section of data that should not go through the XHTML entity translation (parsing) process. In other words, 3 special characters: "<", ">", and "&" can be directly used in CDATA. They wil... 2024-02-28, ∼2611🔥, 0💬

Two HTML Elements Overlapping Each Other
Can Two HTML Elements Partially Overlap Each Other? No, two elements can not partially overlap each other. One element must be completely enclosed inside the other element. See the following two examples:  <p>There was once ... 2024-02-28, ∼2186🔥, 0💬

Required Sub-elements in HTML
What Is a Required Sub-element? A required sub-element is a sub-element that you must included in the parent element. Most sub-elements are optional. But there are some sub-elements that are required by their parent elements. Here are two good examples: <!-- Valid: "head" requires "title" --&... 2024-02-28, ∼2089🔥, 0💬

White Space Characters in HTML
What Is a White Space Character? A white space character is a character that leaves nothing on your screen. There are 4 known white space characters: " " - The space character. "\t" - The tab character. "\n" - The new line character. "\r" - The carriage return character. White space characters are g... 2024-02-18, ∼2081🔥, 0💬

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