i have found this code when view the source code of the blog, is rel='external nofollow' have the same function with rel="nofollow" thanks
I'm not really sure of your question, so will guess. The nofollow value for rel tells search bots not to consider the link. The link won't be followed and it will not be used to calculate page rank (by Google). The external value is non-standard, and is probably used to determine whether the link should open in a new page. On my site, I use rel="ext" as a selector to add a background image of an arrow to indicate that the link goes to a page not on my site. Does that help? cheers, gary