HTML Element Content Models
What Are the HTML Element Content Models?
There are 4 content models defined for HTML elements:
1. EMPTY - No content. Nothing between the opening tag and the closing tag. For example:
<br/> - "br" element has no content. <br></br> - Same as above. <meta name="Author" content="FYICenter.com"/>
2. PCDATA - Parsed Character DATA. A string of characters and character entities. Empty content is allowed in this model. But no other HTML elements are allowed in the content.
<!-- PCDATA: Pure character string --> <title>My First HTML Document</title> <!-- PCDATA: Empty string --> <textarea rows="4" cols="40"></textarea> <!-- PCDATA: Characters mixed with entities --> <textarea rows="4" cols="40"> while ($i=0; $i<3; %i++) print "Knock "; </textarea>
3. Sub-elements only - A sequence of sub-elements. No character strings are allowed in the content.
<!-- Sub-elements only: "head" can only take sub-elements like "title" and "meta" --> <head> <title>My First HTML Document</title> <meta name="Author" content="FYICenter.com"/> </head> <!-- Sub-elements only: "tr" can only take sub-elements like "td" --> <tr> <td>Author:</td> <td>FYIcenter.com</td> </tr> <!-- Sub-elements only: "ul" can only take sub-elements like "li" --> <ul> <li>My First XHTML Document</li> </ul>
4. Mixed - A mixture of PCDATA and sub-elements. Empty content is also allowed in this model.
<!-- Mixed content: "p" is having text strings mixed an "em" element --> <p>The nature of <em>yin and yang</em> is relative.</p> <!-- Mixed content: "td" is having text strings mixed with a "p" element --> <td>Dear Visitor, <p>Welcome to FYIcenter.com!</p> Thank you. </td>
2017-07-30, 1072👍, 0💬
How to use the "set-variable" Policy Statement to create custom variables for an Azure API service o...
What is Azure API Management Developer Portal Admin? The Developer Portal Admin is an Azure Web port...
What is test testing area for? The testing area is provided to allow visitors to post testing commen...
How to write a policy to set and get custom variables? Here is a policy that sets and gets custom va...
How to detect errors occurred in the json_decode() call? You can use the following two functions to ...