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A knol on knee surgery
Type of site
|Launched||July 23, 2008|
Knol was a Google project that aimed to include user-written articles on a range of topics. It was closed on April 30, 2012, and all content was deleted by October 1, 2012. Lower-case, the term knol, which Google defined as a "unit of knowledge", referred to an article in the project.
The project was led by Udi Manber, a Google vice president of engineering. It was announced on December 13, 2007, and was opened in beta version on July 23, 2008, with a few hundred articles, mostly in the health and medical field.
All contributors to the Knol project had to sign in with a Google account and were supposed to state their real names. Contributions were licensed by default under the Creative Commons CC-BY-3.0 license (which allowed anyone to reuse the material as long as the original author was named), but authors were also able to choose the CC-BY-NC-3.0 license (which prohibits commercial reuse) or traditional copyright protection instead. Knol employed "nofollow" outgoing links, using an HTML directive to prevent links in its articles from influencing search-engine rankings.
Knol was described both as a rival to encyclopedia sites such as Wikipedia, Citizendium, and Scholarpedia and as a complement to Wikipedia, offering a different format that addressed many of Wikipedia's shortcomings. BBC News reported that "Many experts saw the initiative as an attack on the widely used Wikipedia communal encyclopaedia. The non-profit Wikimedia Foundation, which owned the name Wikipedia and the servers hosting the Wikipedia projects, welcomed the Google Knol initiative, saying that "The more good free content, the better for the world." While Wikipedia articles were written collectively under a "neutral point of view" policy, Knol was to highlight personal expertise by emphasizing authorship.
After Knol's beta launch, Google product manager Cedric Dupont responded to the idea that Google intended Knol to be a "Wikipedia killer" by saying, “Google is very happy with Wikipedia being so successful. Anyone who tries to kill them would hurt us.” The New York Times noted similarities in design between Knol and Wikipedia, such as use of the same font. Dupont responded that the use was simply a coincidence as it is a commonly used font.
Because of Knol's format, some said Knol would be more like About.com than Wikipedia. According to Wolfgang Hansson, a writer at DailyTech, Knol may have been planned for About.com originally when it was up for acquisition. Hansson reported that several sources close to the sale said Google was planning to acquire About.com, but the executives at About.com learned Google was planning to move from About.com's model to a wiki-style model. That would have meant layoffs for all 500 or so "Guides" at About.com.
Conflict of interest
After Google's announcement of the project in December 2007, there was speculation on its motives and its position as a producer of content rather than as an organizer. The Guardian's Jack Schofield argued that "Knol represents an attack on the media industry in general."
There was debate whether Google search results could remain neutral because of possible conflict of interest. According to Danny Sullivan, the editor of Search Engine Land, "Google’s goal of making Knol pages easy to find on search engines could conflict with its need to remain unbiased." Jeff Chester, executive director of the Center for Digital Democracy, raised similar concerns: "At the end of the day, there's a fundamental conflict between the business Google is in and its social goals. What you're seeing here, slowly, is Google embracing an advertising-driven model, in which money will have a greater impact on what people have ready access to." As a response to such concerns it was said  that Google already hosted large amounts of content in sites like Google Sites, YouTube, Blogger and Google Groups and that there is no significant difference in this case.
- Monaghan, Angela (2007-12-14). "Google's 'knol' may challenge Wikipedia". The Daily Telegraph. Retrieved 2007-12-15.
- Levy, Steven (2008-07-23). "Google Throws Open Rival for Wikipedia — Anon Authors Discouraged". Wired News. Retrieved 2008-07-23.
- Mills, Ellis (2008-07-23). "Google's Wikipedia rival, Knol, goes public". CNET News. Retrieved 2008-07-23.
- Helft, Miguel (2008-07-23). "Wikipedia, Meet Knol". The New York Times. Retrieved 2008-07-23.
- Schofield, Jack (2008-07-23). "Google opens up Knol, its Wikipedia-for-cash project". The Guardian. Retrieved 2008-07-26.
- Blakely, Rhys (2007-12-15). "Google to tackle Wikipedia with new knowledge service". The Times. Retrieved 2007-12-15.
- Anderson, Nate (Jan 19, 2009). "Google Knol six months later: Wikipedia need not worry". Ars Technica. Retrieved 2009-01-21.
- Arthur, Chris (7 August 2008). "Google attacked over Knol's spam potential". The Guardian. Retrieved 2009-01-21.
- Manjoo, Farhad (September 22, 2008). "Chuck Knol". Slate. Retrieved 2008-09-23.
- Mike Linksvayer, Google Code adds content licensing; Google Knol launches with CC BY default, Creative Commons Blog, July 23, 2008
- Lenssen, Philipp (2008-07-24). "Knol’s Nofollowing Of Links". Google Blogoscoped. Retrieved 2008-07-30.
- Riley, Duncan (2007-12-14). "Google Knol: A Step Too Far?". TechCrunch. Retrieved 2007-12-14.
- Frederick, Lane (2007-12-14). "Death Knell Sounds for Wikipedia, About.com". NewsFactor Network. Retrieved 2007-12-14.
- Masnick, Mike (2007-12-14). "Google Decides Organizing The World's Information Is Easier If That Info Is Online". Techdirt. Retrieved 2007-12-14.
- Manjoo, Farhad (2007-12-14). "Truthiness showdown: Google's "Knol" vs. Wikipedia". Salon.com. Retrieved 2007-12-14.
- Hof, Rob (2007-12-14). "Google's Knol: No Wikipedia Killer". Businessweek. Retrieved 2007-12-14.
- "Google debuts knowledge project". BBC. 2007-12-15. Retrieved 2007-12-15.
- Levy, Ari (2007-12-14). "Google Starts Web Site Knol to Challenge Wikipedia". Bloomberg. Retrieved 2007-12-15.
- Hansson, Wolfgang (2007-12-14). "Google Announces Knol Wikipedia-like Service". DailyTech. Retrieved 2007-12-14.
- Schofield, Jack (2007-12-15). "Google tries Knol, an encyclopedia to replace Wikipedia". The Guardian. Retrieved 2007-12-15.
- Greenberg, Andy (2007-12-14). "Google's Know-It-All Project". Forbes. Retrieved 2007-12-16.
- Helft, Miguel (2007-12-15). "Wikipedia Competitor Being Tested by Google". New York Times. Retrieved 2007-12-15.
Some critics said that shift could compromise Google’s objectivity in presenting search results.
- Schiffman, Betsy (2007-12-14). "Knol Launch: Google's 'Units of Knowledge' May Raise Conflict of Interest". Wired. Retrieved 2007-12-15.
- Morrison, Scott (2007-12-14). "Google Targets Wikipedia With New 'Knol' Pages". The Wall Street Journal. Retrieved 2008-07-24.