Cross-domain rel=canonical now supported by Google
rel=canonical is a way to tell Google which the primary version of a URL is. It's handy if you have substantially the same content on several URLs - perhaps because you have a shopping site and allow users to sort a list of products by price or name, and this is reflected in the URL.
Adding this meta tag used to work only for URLs on the same domain, but this has changed as this diagram from Google shows:

You can now use rel=canonical cross domain
Google has announced today that it will support rel=canonical across domains - ie if you have the same content on more than one website, you can tell Google which is the main version you'd like it to index. It's particularly handy if you've changed domain names, and don't have a way to do server-side redirects on the old domain / server.
You can read more about the change to cross-domain rel=canonical here.
Maybe I can use it to get my original post on reporting restrictions for bloggers to stop being outranked by the duplicate version on the online journalism blog. *Scowls at Google.*
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[...] major search engines have agreed a new tag - rel=canonical - so that you can tell them, if you have the same content across several URLs on your site, which [...]
Hi Malcolm,
I know this is effective but I am stuck with one of our client website where he has no way to implement the code on the head section of the page. IIS server shared server so can't redirect the page, even worse page is calling from database and if anything is placed on head section it will apply to all the pages of the website.
Now the real problem is my main page is deindexed from the Google and new page is indexed due to that I lost the rankings as new page has no value whereas my previous indexed page is PR3.
Now can you please suggest some way to index the PR page instead of copy of the same.
Build links to the page you want to index (particularly from the duplicate to the main one)? That should work eventually ...
All of the links are pointing to original page.
Also changed the links on all the pages of the website internally and inbound links.
Is it possible to place this code on internal pages of the website.
Keyword
will this going to work?