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HTML tag

Example

Describe the metadata of the HTML document:

Browser support

All major browsers support tags.

Label definition and instructions for use

Metadata (Metadata) is the data information of data.

Tags provide metadata for HTML documents. The metadata will not be displayed on the client side, but will be parsed by the browser.

The META element is usually used to specify the description of the web page, keywords, the last modification time of the file, the author, and other metadata.

Metadata can be invoked using browsers (how to display content or reload pages), search engines (keywords), or other Web services.

Tips and comments

Note: the label is usually located in the area.

Note: metadata usually appears as a name / value pair.

Note: if the name attribute is not provided, the name in the name / value pair takes the value of the http-equiv attribute.

The difference between HTML4.01 and HTML5

The scheme attribute is not supported by HTML5.

In HTML5, there is a new charset attribute that makes the definition of the character set easier:

HTML4.01:

HTML5:

The difference between HTML and XHTML

There is no closing tag in HTML.

The tag must contain a closing tag in the XHTML.

Example

Example 1-define document keywords for search engines:

Example 2-define the web page description:

Example 3-define the page author:

Example 4-refresh the page every 30 seconds:

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