TheOptimizationIdiot - 7:21 pm on Apr 10, 2013 (gmt 0)
Last week Google, Yahoo, and Microsoft announced support for a new link element to clean up duplicate urls on sites. The syntax is pretty simple: An ugly url such as http://www.example.com/page.html?sid=asdf314159265 can specify in the HEAD part of the document the following:
<link rel="canonical" href="http://example.com/page.html"/>
That tells search engines that the preferred location of this url (the “canonical” location, in search engine speak) is http://example.com/page.html instead of http://www.example.com/page.html?sid=asdf314159265 .
Dave, it’s totally fine for the preferred version of the page to point back to itself. I’d recommend using absolute urls just to prevent any potential problems from popping up, but that should be no problem at all.