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Gianluca, Rand's whiteboard Friday a couple of weeks ago may help you: http://moz.com/blog/handling-duplicate-content-across-large-numbers-of-urls Though the Whiteboard Friday is about duplicate content issues, 1 piece you can probably us from it is this: embed an iframe on page of the content to leave the content out of the index and the content will not be perceived to be part of the URL when using iframe. Add “noindex” in the HTML doc in the iframe to be 100% sure that search engines do not index it.