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A Survey of Rel Values on the Web » DeWitt Clinton

by karlcow 2 comments

The mapreduce scanned approximately 177 million recently crawled HTML documents, parsing and counting rel values in link and anchor tags along the way. In those 177M documents, I found just over 19 billion <a> and <link> tags in total. And of those 19B tags, 1.8 billion of them contained a non-empty rel attribute.

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Il scanne 177 millions de documents et trouve en moyenne 4,7 rel="nofollow" par page visitée ? Ce qui pose deux questions : médiane et type de l'échantillon. "Further down we learn that as OpenID continues to gain in adoption the openid.server and openid.delegate rel values come in at #35 and #43 respectively — impressive", sachant que le n°25 apparaît sur 1,4% des pages, on s'attend à être très impressioné. "Even the newly agreed-upon canonical rel value makes a showing at #271, and will surely rise to the top 25 or so over the next year or two." Surtout si Wikipedia l'utilise : deux lignes de code, et rel="canonical" connaîtra plus d'utilisation que XFN n'en a jamais rêvé.

night.kame said at 00:23 the 19/02/2009

ce qui veut dire que si Wikipedia fait deux lignes de code pour insérer Content-Location, on peut espérer renverser la tendance du content-location bogus.

karlcow said at 17:24 the 20/02/2009


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karlcow
the 18/02/2009 at 20:43