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A comment on See How Well Google Knows Your Circle of Friends.

Re:See How Well Google Knows Your Circle of Friends by pbhjpbhj on Sunday August 08, 2010 @11:49AM (#1585478)
So, my questions are will this be used to alter search results - eg this person is well connected in this field and regularly visits these domains, hence we'll add a bit of authority to those domains? Seems they should probably try it.

Also are they using meta data like XFN and microformats to garner some of the data or is it just internal Google social links?

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Re:See How Well Google Knows Your Circle of Friends by adewale on Sunday August 08, 2010 @12:45PM (#1585604)
The part that uses the Social Graph API: http://code.google.com/apis/socialgraph/docs/ is based on crawling XFN rel="blah" links from all over the web. The canonicalisation layer that's used is opensource: http://code.google.com/p/google-sgnodemapper/
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