The big role of meta in HTML documents

Meta is a response header message that is used to simulate an HTTP protocol in an HTML document. Meta tags are used in
Name Property
1, <meta name= "generator" contect= "" to describe the build tools (such as Microsoft FrontPage 4.0);
2, <meta name= "KEYWords" contect= "" to the search engine to explain the keywords of your web page;
3, <meta name= "DEscription" contect= "" to tell search engine your site's main content;
4, <meta name= "Author" contect= "Your name" > Tell the search engine your site's production of the author;
5, <meta name= "Robots" contect= "All|none|index|noindex|follow|nofollow"
The properties are described below:
Set to all: The file will be retrieved and the link on the page can be queried;
Set to None: The file will not be retrieved and the link on the page cannot be queried;
Set to index: file will be retrieved;
Set to follow: the link on the page can be queried;
Set to NOINDEX: The file will not be retrieved, but the link on the page can be queried;
Set to Nofollow: The file will not be retrieved and the link on the page can be queried.

Http-equiv Property
1, <meta http-equiv= "Content-type" contect= "text/html" charset=gb_2312-80 "" and <meta http-equiv= "Content-Language" The contect= "ZH-CN" is used to explain the text and language used for home page production, as well as the iso-8859-1 character set, as well as BIG5, Utf-8, Shift-jis, Euc, Koi8-2 and other character sets;
2, <meta http-equiv= "Refresh" contect= "N;url=http://yourlink" to make the page in the specified time n, jump to the page http;//yourlink;
3, <meta http-equiv= "Expires" contect= "mon,12 May 2001 00:20:00 GMT" "can be used to set the expiration time of the Web page, once expired must be called back to the server. It is important to note that the GMT time format must be used;
4, <meta http-equiv= "Pragma" contect= "No-cache" is used to set the browser from the local computer cache to access the content of the page, set once away from the Web page can not be removed from the cache;
5, <meta http-equiv= "Set-cookie" contect= "mon,12 May 2001 00:20:00 GMT" >cookie set, if the page expires, save the cookie will be deleted. Attention must also be paid to the use of GMT time format;
6, <meta http-equiv= "Pics-label" contect= "" "> Web rating, in IE Internet Options, there is a content settings, you can prevent browsing some restricted sites, and the site's limit level is through the meta attribute to set;
7, <meta http-equiv= "Windows-target" contect= "_top" to force the page in the current window with a separate page display, you can prevent their own web page by others as a frame page call;
8, <meta http-equiv= "Page-enter" contect= "Revealtrans (duration=10,transtion= 50)" "and <meta http-equiv=" Page-Exit " Contect= "Revealtrans (duration=20,transtion=6)" Sets the special effect of entering and leaving the page, which is the "Format/page transition" in FrontPage, but the page you add cannot be a frame page.

The above is commonly used several meta attributes, has the personal homepage friend May as well add it in your homepage, the effect is not the same!