META tags in HTML--often overlooked in the past

W3school Introduction: http://www.w3school.com.cn/html5/html5_meta.asp

Meta is the response header message used to simulate an HTTP protocol in an HTML document.

Meta tags are useful for many purposes.

There are two types of meta attributes: Name and HTTP-EQUIV.

The name attribute is primarily used to describe web pages, which correspond to content (Web pages), so that search engines can be found and categorized (almost all search engines use online robots to automatically find meta values to categorize Web pages). The most important of these is description (site on the search engine description) and keywords (categorical keywords), so should be added to each page a meta value. The following are some of the more commonly used:

Name property

1, <meta name= "Generator" contect= "" > To illustrate the Build tool (such as Microsoft FrontPage 4.0), etc.;

2, <meta name= "KEYWords" contect= "" > to the search engine to explain the keywords of your page;

3, <meta name= "DEscription" contect= "" > Tell the Search engine the main content of your site;

4, <meta name= "Author" contect= "Your Name" > tell the Search engine the author of your site's production;

5, <meta name= "Robots" contect= "All|none|index|noindex|follow|nofollow" >

The properties are described as follows:

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: The file will be retrieved;

Set to follow: links 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" contect= "ZH-CN" > to illustrate the text and language used in the production of the homepage;

Also such as English is iso-8859-1 character set, there are BIG5, Utf-8, Shift-jis, Euc, Koi8-2 and other character sets;

2, <meta http-equiv= "Refresh" contect= "N;url=http://yourlink" > Timing let 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 and must be recalled to the server once it expires. 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 page content, set once left the page can not be recalled from the cache;

5, <meta http-equiv= "Set-cookie" contect= "mon,12 May 2001 00:20:00 GMT" >cookie set, if the page expires, the cookie will be deleted. It is also important to note that GMT time format must be used;

6, <meta http-equiv= "Pics-label" "contect=" "> Page rating, Internet Options in IE have a content setting, you can prevent browsing some restricted sites, The limit level of the website is set by the meta attribute;

7, <meta http-equiv= "Windows-target" contect= "_top" > Force 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=)" > and <meta http-equiv= " Page-exit "contect=" Revealtrans (duration=20,transtion=6) > Set special effects when entering and leaving the page, which is "format/page Transitions" in FrontPage, However, the added page cannot be a frame page.

The above is a few meta attributes commonly used, have a personal homepage of friends may wish to add it to your homepage, the effect is not the same oh:).

META tags in HTML--often overlooked in the past