<head profile="http://gmpg.org/xfn/11"> what is this?

Theoretically speaking, I believe this is a wonderful attribute to add to a link. By identifying this parameter in the link origin offers the possibility to add another metric in the attempts to verify the importance of a link by the search engines of today and the companies that utilize the data in the future. This attribute could help determine if a link to someone is not spam or spam-esque.

Unfortunately, there would be a "continual static" in the data from manipulation of the web masters to use the most impactful link relationship as results demonstrate instead of an actual.
I believe that no matter the hardship now to incorporate, this important attribute should be used and tracked regardless of the possible manipualtions.

Has anyone seen anything more on this attribute being utilized or incorporated? I'll keep reading. Thanks for the hard work.