XFN is another web3.0 concept used to define human relationship in the hyperlinks. When ever we had a blog in our blogroll add the relation of the author and the author of the other blogger using the ‘rel’ attribute in the hyperlink. For eg: Kenney is my friend, colleague, co-worker etc. So how can make kenney’s blog in my blog XFN friendly is like below.
<a href="http://kenneyjacob.com" rel="friend met">Kenney Jacob</a>
<a href="http://kenneyjacob.com" rel="colleague met">Kenney Jacob</a>
<a href="http://kenneyjacob.com" rel="co-worker met">Kenney Jacob</a>
Where the importance come is with the web spiders. The web spiders are programs that digg web pages. By adding the blog roll XFN friendly the web spiders can understand the relationship between the sites.
XFN 1.1 relationships meta data profile include
Google recently released a social graph api. This help developers to digg connected peoples very fast. Suppose i am web developer mostly into php development. I am able to find the online php developers by using this social graph api. Great work google!!.