Possible Duplicate:What is duplicate content and how can I avoid being penalized for it on my site? The same page, or rather the same content on a page is accessible from two very similar URLs, namely:http://www.example.com/path/to/page.phphttp://www.example.com/path/to/page.php?catIndex=1The URL param in this case affects all the navigation links on the page. Basically, the same page is accessible via two separate navigation routes. To the end user, who doesn't look at the URL, they could be perceived as two separate pages in different parts of the site, although the content is identical.I have a rel=canonical link element linking to the first URL (without the URL param).Could a search engine perceive this as duplicate content?I think my eyes have gone square, but I was considering adding a robots noindex meta tag to the page when the catIndex URL param exists. But it is really the same URL and I do want the content indexed once, so I'm now thinking this would be foolish?!
Same page in different locations on same site - duplicate content?
search engines;url;duplicate content;canonical url
If you're using canonical URLs, and you are, you're fine. Canonical URLs were created for the very scenario you are experiencing. Don't change or worry about a thing. :)