Author
Message
Harold
Posts:2494
Senior member
Member since: 2006-11-30
:: Quote ::
Subject: Canonical tag
Google, Yahoo, and MSN have apparently agreed on a tag to use to specify the "canonical" URL for a particular page, to avoid multiple versions of the URL being indexed, creating duplicate content issues:

[googlewebmastercentral.blogspot.com]

This is great, but how do I find out if I HAVE duplicate content issues that I might need to remedy with this? I would have to put the tag in the head of every page involved, and it's different for every page....
February 13, 2009 04:44PM
GegaBit
Posts:3311
Senior member
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
Welcome back Harold, been a while..

AFAIK Google webmaster tools reports for you pages with duplicate tags title and description. There too you specify which version of your site you want indexed: With or without www.

The usual way for detecting duplicate issues is a loss of ranking.

I don't think I need this new tag as I have no dynamic pages indexed, all static.
February 13, 2009 06:20PM
Harold
Posts:2494
Senior member
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
Ah, I'm all static too, and no troubles reported in Webmaster Tools either. Well, I hope this is of interest to someone.

And yes, it's been a while. We moved! Just about a mile, from one apartment to another. No phone line at the new apartment till Tuesday, so no Internet either. Can only log on at work.
February 13, 2009 06:30PM
GegaBit
Posts:3311
Senior member
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
For a moment I thought you'd say Canada!
February 13, 2009 07:39PM
Harold
Posts:2494
Senior member
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
The move to Canada was virtual-only....
February 13, 2009 08:16PM
DamonHD
Posts:6158
Moderator
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
Hmm, interesting, thanks.

I think I've sorted all my accidental non-canon problems out with 302s and 301s, etc, but I'm not sure if I should have my explicit mirror sites mark the 'main' site content as canonical. Those geographic mirrors are there for a reason...

Rgds

Damon
February 13, 2009 08:37PM
Khensu
Posts:766
Senior member
Member since: 2006-12-01
:: Quote ::
Subject: Re: Canonical tag
Virtual move to Canada?

Now that is cyberchilling!

And you all can kiss my "canonical".

god, where is Troi when you need her?

www this!
February 14, 2009 09:07AM
Joshua
Posts:2831
Administrator
Member since: 2007-03-16
:: Quote ::
Subject: Re: Canonical tag
I'm seeing these "Google ads new tag" all over the web.

There is no new tag! The tag is "link", the attribute is "rel". We're talking about a new value for the "rel" attribute.

A good use IMO is marking your printer friendly pages. But I don't know if the Search engines will think it's still a canonical page with all the navigation/ads stripped from the page. You can't typically 301 redirect these as they have a purpose but still are duplicate content.
February 14, 2009 02:47PM
wrench
Posts:210
Preferred member
Member since: 2007-01-15
:: Quote ::
Subject: Re: Canonical tag
I use the following redirects in my .htaccess to resolve Canonical issues, I do not leave it up to chance, I set how pages and folders can be accessed.

RewriteEngine on
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /index\.html
RewriteRule ^index\.html$ [www.sitename.com] [R=301,L]
RewriteCond %{HTTP_HOST} ^sitename\.com
RewriteRule (.*) [www.sitename.com] [R=301,L]

For me this 301 redirects non-www to www
and any index to it's directory root & adds the / to the end of .com

I just took back a site I sold a little over a year ago due to non-payment, and the webmaster had deleted the .htaccess so he could do some redirects via a graphical interface, and it took away all the redirects I had done. Now the site is indexed with all kinds of canonical problems, including duplicate problems with http & https pages that I also resolved with another bit in .htaccess. I will have to wait until the search engines re-index the whole site, and finally drop all the canonical issue pages and list the pages the way I want.

Wrench
February 18, 2009 10:47PM
GegaBit
Posts:3311
Senior member
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
Welcome back wrench
February 18, 2009 11:01PM
wrench
Posts:210
Preferred member
Member since: 2007-01-15
:: Quote ::
Subject: Re: Canonical tag
Thanks GB
February 18, 2009 11:09PM
DamonHD
Posts:6158
Moderator
Member since: 2006-11-30
:: Quote ::
Subject: Re: Canonical tag
Yes, welcome back!
February 18, 2009 11:28PM

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