- 22 Apr 09, 11:44 GMT
"Web 3.0 is Web 2.0 without the silos," Tim Berners-Lee has told the World Wide Web 2009 conference in Madrid.
My colleague Roberto Belo is live tweeting the event on his personal Twitter account here.
So what does Sir Tim mean when he talks about silos? Well, I guess he's referring to a web in which moving your data between sites and web applications is more of a hope than a reality.
But these remain silos - they may well be welcoming people to join with open arms but they remain partial answers because of the very fact Facebook Connect and Open Social do not talk to each other at a data level.
But this isn't just about "content", such as messages and photos, but also the underlying semantic data which underpins our activity online; data that should also be able to move freely around our web journeys.
Why is it not possible to take data from one website and have a completely different website understand what it is and know what to do with it?
For example, if I am using my online banking service and am entering details of a planned single payment in the future, why can't my online calendar read that data and automatically enter details of the transaction into my diary?
Right now this does not happen because the underlying architecture of the data does not yet exist on the web.
This so-called Semantic Web is only now being built and in order for it to succeed it must be open, Sir Tim has stressed.
These URIs are a common standard which allow us to describe the world of things - from people to objects - in a way machines can understand and make use of.
Sir Tim told the conference: "We are at the beginning of a much bigger future. Build a platform for others that follow, do not assume what they will use it for"
Sir Tim also took questions at the conference and has once again expressed his opposition to ISPS using their role as a gateway to the web and the net, as a chance to mine commercial revenue from user activities while online.
"It's key that ISPs provides with clean connection to the web, no snooping, no discrimination; like a water company provides water."
For ISPs such as BT, Virgin and Talk Talk who are thinking of doing exactly that - the message is clear.
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