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I have been informed that search engine support is inconsistent for the rel attribute with the 'nofollow' value.

Is this the case.

From my research Google, Yahoo and Bing seem to obey this attribute and will NOT follow links with it present.

I need to be sure before questioning the integrity of the SEO team :)

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up vote 2 down vote accepted

All of the major search engines have acknowledged support for rel="nofollow"

From Wikipedia:

While all engines that use the nofollow value exclude links that use it from their ranking calculation, the details about the exact interpretation of it vary from search engine to search engine.

Google states that their engine takes "nofollow" literally and does not "follow" the link at all. However, experiments conducted by SEOs show conflicting results. These studies reveal that Google does follow the link, but does not index the linked-to page, unless it was in Google's index already for other reasons (such as other, non-nofollow links that point to the page).

Yahoo! "follows it", but excludes it from their ranking calculation.

Bing respects "nofollow" as regards not counting the link in their ranking, but it is not proven whether or not Bing follows the link.

Ask.com also respects the attribute.

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Although it seems that support does vary? en.wikipedia.org/wiki/Nofollow –  Digital Essence Mar 23 '11 at 15:01
    
@Digital, looks like we both were at Wikipedia at the same time :) –  John Conde Mar 23 '11 at 15:03
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Yup. The more I answer questions on here the more I learn. It's great! –  Digital Essence Mar 23 '11 at 15:06
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I don't think Wikipedia is a good source to use...maybe next time we can come up with something more reliable? –  Cupcake Jun 16 '11 at 22:45
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