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Tags that can be added are:<title>, <base>, <link>, <meta>, <script>, and <style>.
The <base> tag specifies the default address of all links on the page or the default destination target.
<HTML><Head> <Basehref= "http://www.w3school.com.cn/i/" /> <BaseTarget= "_blank" /></Head><Body> <!--the head section has set a benchmark ur. - <imgsrc= "Eg_smile.gif" /> <P><ahref= "http://www.w3school.com.cn">W3school</a></P></Body></HTML>
The <meta> element provides meta-information about the page meta-infomation, such as keywords for search engines and update frequency descriptions.
<mata> does not contain any content, and its properties define the key/value pairs associated with the document.
All servers must send at least one: content-type:text/html.
The Content property primarily provides values for key/value pairs. It must be used with the Name property or the Http-equiv property.
① The Name property and the Content property
The Name property primarily provides the names of keys for key/value pairs. Supported property values are:author, description, keywords, generator, revised, and others.
<Metaname= "Author"content= "X"/><Metaname= "Revised"content= "X,9/1/15"/><Metaname= "Generator"content= "Aptana 3.0"/><Metaname= "keywords"content= "Hello,speak,human,computer"/><Metaname= "description"content= "This is a test."/>
②HTTP-EQUIV Properties and Content properties
The Http-equiv property mainly provides the name of the key for the key/value pair. The supported property values are:content-type, expires, refresh, Set-cookie, and so on.
The Content property primarily provides values for key/value pairs. It must be used with the Name property or the Http-equiv property.
When the server sends a document to the browser, multiple key/value pairs are sent first.
More details
<Metahttp-equiv= "Content-type"content= "text/html/><meta http-equiv="CharSet "Content= "gb2312" /><Metahttp-equiv= "Expires"content= "Wed, June 22:33:00 GMT" /><Metahttp-equiv= "Refresh"content= "2;url=http://www.net.cn/"/><meta http-equiv= "Pragma"content= "No-cache"/><meta http-equiv= "Set-cookie"content= "Cookievalue=xxx;expires=wednesday, 20-jun-2007 22:33:00 GMT; path=/" /><Metahttp-equiv= "Window-target"content= "_top"/>
HTML Notes (vii) head related elements <base> & <meta>
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