Rev=canonical: url shortening that doesn't hurt the internet(revcanonical.appspot.com)3 points·by markup·17 ปีที่แล้ว·1 commentsrevcanonical.appspot.comRev=canonical: url shortening that doesn't hurt the internethttp://revcanonical.appspot.com/1 commentsPost comment[–]aristus·17 ปีที่แล้วreplyThere's already a rel=canonical element supported by the major search engines:http://ysearchblog.com/2009/02/12/fighting-duplication-addin...
http://ysearchblog.com/2009/02/12/fighting-duplication-addin...