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Moderator Alumni![]() Group: Hall Of Fame
Joined: 31-August 02
Posts: 15,634
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Jan 21 2007, 03:13 PM |
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QUOTE If Google had been smart they would have kept PageRank as a corporate secret like the KFC or Coca Cola secret recipes. It's a great principle provided you don't tell anyone about it. But they couldn't, since PageRank doesn't belong to them, but rather to Stanford University. It's also possible that the PageRank technology was part of what made them popular. When we think of some trade secrets, like the KFC and Coca Cola recipes, there are things about those that are known - afterall, they are recipes. The exact ingrediants of PageRank can only be guessed at, and there are elements that we don't know anything about. For instance, how does the algorithm treat dangling nodes? That is, pages that don't have any links pointing out from them, such as a PDF file, or a txt page? How do the ranking algorithms used presently by Google treat sites that don't have any links pointing outside of their own pages? Or that use some prophylactic measure like nofollow on all of their links? If a majority of sites started using nofollow on all of their external links, following the leadership of the Wikipedia, would it have an affect on how sites are ranked? There are many other ways that a search engine could measure the value of links from a site like wikipedia than just a pagerank value. For instance, entries in wikipedia all have explicit timestamps associated with them - easy to find and measure (see: Temporal Analysis of the Wikigraph for an interesting analysis of the temporal aspects of the site). What we don't know, though I've seen some discussion of it, is whether a newly discovered link has as much value as one that has been around for months, or for years? The historical data patent application from Google a couple of years back seemed to consider the age of links as an aspect that could affect scoring of pages - though whether or not that is done is part of the secret recipe. We just don't know. Should Wikipedia use nofollow on all external links? The reason cited is that they want to reduce vandalism. Perhaps they should note that all links are nofollowed clearly on all pages that can be edited if they want to meet that intent. I suspect that even if they did that, the amounts of vandalism to wikipedia wouldn't be reduced in any meaningful way. It appears that the cost of vandalizing wikipedia is very small, and even the rewards of a few visitors to links may be considered valuable. |
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Moderator/Blog Editor![]() ![]() Group: Site Admin
Joined: 18-January 05
Posts: 5,375
From: Olympia WA, USA
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Jan 21 2007, 07:25 PM |
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QUOTE Just for your info, the Cre8asite forum is mentioned here: Not any more! http://en.wikipedia.org//wiki/Wikipedia:Ad..._spam_onslaught. QUOTE Wikipedia does not have a project page with this exact name. We are listed under references here, for the SEMkit review: http://en.wikipedia.org/wiki/Dan_Thies And under external links here, for the comprehensive robots.txt tutorial: http://en.wikipedia.org/wiki/Robots_Exclusion_Standard This post has been edited by AbleReach: Jan 21 2007, 07:31 PM |
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Centenarian PosterGroup: Members
Joined: 5-March 06
Posts: 110
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Jan 23 2007, 06:44 AM |
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In a post Matt Cutts published an hour ago, he says:
QUOTE I don’t expect this change to affect Google’s rankings very much, but it’s good to see the Wikipedia folks paying close attention to link spam (and open to refining their trust for external links). To me, his statement implies that, like many already suspected, those Wikipedia links were not passing much link juice to begin with. |
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Moderator![]() Group: Moderators
Joined: 20-August 03
Posts: 1,248
From: New York
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Jan 23 2007, 07:05 AM |
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Danny Sullivan suggested in yesterdays daily search cast that if we ever link to wikipedia, we should use the nofollow.
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