The control the Web took from the vertically integrated, top-down media world can, with a little rethinking of the nature and the use of the Internet, be taken back.

We have written a lot about the different approaches to the Semantic Web - the classic bottom-up approach and the new top-down one.

The potential changes follow Facebook's introduction ofits "Like" button last year, which users can click to show they likea piece of content or a brand on Facebook.com and other sites.