I went to mat blog and he is using [rel='external nofollow'] probably the same effect as “nofollow†but doesn’t highlight on firefox plugins.
Looks like it only no follows external links, thats a pretty nice extension to the nofollow meta tag! Agh apparently i give you rep too often so i cant give you anymore right now..
search for the file called usercontent.css this is for firefox, and add the following css code a[rel="external nofollow"] { border: thin dashed firebrick ! important; background-color: rgb(255, 200, 200) ! important; } this will highlight the no follow links
So Matt uses it, but he hasn't blogged about it, as far as I can tell. The meaning does seem to be that only external links won't be followed. Which would have obvious benefits. But I'm not sure it's an officially recognized tag - so it's unclear whether it would actually work. [source: I just googled the tag, it's all over the forums, but doesn't give any results from either Matt Cutts blog itself or the official google blog]
google design this method for wordpress, and yes that tag is very effective, but worpress blog comments use it.
Weird that they designed that tag, but did not blog about it. Or did I just not google very efficiently?
It is nothing that "Google designed". There is rel="nofollow" and if you want to add CSS or JS to links you can put more stuff into the rel="" attribute.
That's what I thought. And as long as google doesn't use that , it doesn't actually work. So rel="external nofollow" would be the same as rel="nofollow" as far as the google search engine is concerned. The external in there is probably just to be able to style the link differently (which a lot of blogs, including Matt Cutts' blog) do.