* [CODE(HTML)@en[rel=canonical]]

[1] [CITE[rel=canonical — Anne’s Weblog]] ([TIME[2009-02-17 10:26:13 +09:00]] 版) <http://annevankesteren.nl/2009/02/rel-canonical>

[2] [CITE[Official Google Webmaster Central Blog: Specify your canonical]] ([TIME[2009-02-28 13:56:40 +09:00]] 版) <http://googlewebmastercentral.blogspot.com/2009/02/specify-your-canonical.html>

* [CODE(HTML)@en[rev=canonical]]

[8] [CITE@en[RevCanonical’s Blog]] ([TIME[2009-06-05 08:03:30 +09:00]] 版) <http://revcanonical.wordpress.com/>

[3] [CITE[mnot’s Web log: Counting the ways that rev="canonical" hurts the Web]] ([TIME[2009-05-27 19:02:41 +09:00]] 版) <http://www.mnot.net/blog/2009/04/14/rev_canonical_bad>

[7] [CITE[hail2u.net - Weblog - rev="canonical"]] ([TIME[2009-05-23 17:57:42 +09:00]] 版) <http://hail2u.net/blog/internet/rev-canonical.html>

[4] [CITE[hail2u.net - Weblog - rev="canonical"?rel="shorturl"?それとも・・・]] ([TIME[2009-05-23 17:57:41 +09:00]] 版) <http://hail2u.net/blog/internet/rev-canonical-rel-shorturl-or.html>

* [CODE(HTML)@en[rel=shorturl]]



* [CODE(HTML)@en[rel=shortlink]]

[5] [CITE[rel=shortlink: url shortening that really doesn't hurt the internet]] ([TIME[2009-06-06 18:58:28 +09:00]] 版) <http://rel-shortlink.appspot.com/>

[6] [CITE[shortlink - Google Code]] ([TIME[2009-06-06 18:58:06 +09:00]] 版) <http://code.google.com/p/shortlink/>