The great role of HTML meta_HTML/Xhtml_Web page production

There are two attributes of meta: name and http-equiv. The name attribute is mainly used to describe web pages, corresponding to content (web page content), so that search engine robots can find and classify them (at present, almost all search engines use online robots to automatically find meta values ​​to classify web pages). The most important of these are description (description of the site on search engines) and keywords (categorization keywords), so a meta value should be added to each page. The more commonly used ones are as follows:
name attribute
1. is used to describe the generation tool (such as Microsoft FrontPage 4.0), etc.;
2. describes your web page to search engines. Keywords;
3. Tell search engines the main content of your site;
4. Tell search engines the author of your site;
5.
The attributes are described as follows:
Set to all: files will be retrieved, and links on the page can be queried;
Set to none: files will not be retrieved, and links on the page cannot be queried be queried;
Set to index: the file will be retrieved;
Set to follow: the links on the page can be queried;
Set to noindex: the file will not be retrieved, but the links on the page Links can be queried;
Set to nofollow: the file will not be retrieved, and links on the page can be queried.
HTTP-equiv attribute
1.
and are used to describe the text and language used in making the homepage;
Another example is that English is the ISO-8859-1 character set, and There are BIG5, utf-8, shift-Jis, Euc, Koi8-2 and other character sets;
　2. Schedule the web page to jump to the page http://yourlink within the specified time n;
3. can be used to set the expiration time of the web page. Once it expires, it must be called again on the server. It should be noted that the GMT time format must be used;
4. is used to set the browser to prohibit the browser from accessing the page content from the cache of the local machine. After setting, once you leave the web page, you cannot retrieve it from the Cache. Out;
5. Cookie settings, if the web page expires, the saved cookies will be deleted. It should be noted that the GMT time format must be used;
6. For web page rating, there is a content setting in IE's internet options that can prevent browsing of some restricted websites, and the restriction level of the website is through meta Properties are set;
7. forces the page to be displayed as an independent page in the current window, which can prevent your own web page from being called as a frame page by others;
8. and Set special effects when entering and leaving the page. This function is the "format/webpage transition" in FrontPage, but the added page cannot be a frame page.
The above are several commonly used meta attributes. Friends who have personal homepages may wish to add them to your homepage. The effect will be different :).