TAG:  meta
<meta>
Available in versions: 2.0, 3.2, 4.0
Browser compatibility: Explorer 4, 5  Netscape 4, 6
 
The <meta> tag is primarily used to list information (meta data) about the current HTML document. This information can be anything you want users to know about your site including author names, keywords, subject matter, and topics of interest. This meta data is used extensively by the various Internet search engines.
 
The meta tag can also be used with the http-equiv attribute to simulate HTTP headers.
 
This tag presents the information as name/content paired values by using the name and content attributes. You can have more than one meta element per page.
 
This tag can only be placed inside the head element. There is no closing tag.
 
Core Attributes
 
dir    lang   
 
Attributes
 
content
The content attribute is the content portion of the name/content value. There are no defined values for this attribute. You may choose any words or text you desire. For example, you could choose "keywords" for the name and then use the content attribute to list keywords that you feel are important to your site.
 
http-equiv
The http-equiv attribute can be used in place of the name attribute to create an http-equiv/content value pair. It provides information used to generate HTTP headers (however, most proxy servers ignore this attribute). The permitted values are content-type, expires, refresh, and set-cookie.
 
name
The name attribute is the name portion of the name/content value. There are no defined values for this attribute. You may choose any word you desire. For example, you could choose "keywords" for the name and then use the content attribute to list keywords that you feel are important to your site.
 
scheme
The scheme attribute sets the scheme (the procedure) for interpreting the meta data. This must agree with the profiles listed by the profile attribute of the head tag.
 
Code:
<head>
<meta name="author" content="The Guru">
<meta name="description" content="DevGuru Cascading Style Sheets Quick Reference is a 40 page reference that discusses the style properties that set specific visual parameters for a Web page.">
<meta name="keywords" content="DevGuru, CSS, css, Cascading Style Sheet, cascading style sheet, style sheet, background, border, floating elements, font, margin, padding, text">
<title>DevGuru Cascading Style Sheets Quick Reference</title>
</head>
 
The http-equiv attribute can be used to update a page. In this example, the update occurs every thirty seconds.
 
<meta http-equiv="refresh" content="30">

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