• rev=canonical: url shortening that doesn't hurt the internet
  RevCanonical is url shortening with a twist. Instead of creating its own super short versions of links, it checks to see if the link owner has published a shortened version of the given page using HTML link element. If not, we just return the original URL. And you should bug the link owner about providing a better alternative.
  in Public bookmarks with shortener url web_enviroment

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