PDF for link building - avoiding duplicate content

[BobGW]

Hello,

We've got an article that we're turning into a PDF. Both the article and the PDF will be on our site. This PDF is a good, thorough piece of content on how to choose a product.

We're going to strip out all of the links to our in the article and create this PDF so that it will be good for people to reference and even print. Then we're going to do link building through outreach since people will find the article and PDF useful.

My question is, how do I use rel="canonical" to make sure that the article and PDF aren't duplicate content?

Thanks.

[DoRM]

Indicate the canonical version of a URL by responding with the Link rel="canonical" HTTP header. Addingrel="canonical" to the head section of a page is useful for HTML content, but it can't be used for PDFs and other file types indexed by Google Web Search. In these cases you can indicate a canonical URL by responding with the Link rel="canonical" HTTP header, like this (note that to use this option, you'll need to be able to configure your server):

Link: <http: www.example.com="" downloads="" white-paper.pdf="">; rel="canonical"</http:> 

Google currently supports these link header elements for Web Search only.

You can read more her http://support.google.com/webmasters/bin/answer.py?hl=en&answer=139394