Your first sentence is buzzworded to hell. Do you mean a structured database of all published facts and opinions? Because I'd say the facts worth having are in wikipedia, or should be, so that's the place to work on semantics of facts, and opinions worth hearing are distributed by journalists, so work out how to make the New York Times semantic and work down from there.
As to your second question, because that would be a very stupid and bloody-minded idea. In order to make a simple web everyone can use it might just make sense to do it over a transport everyone can reliably and easily access, i.e. ipv4. Why the hell would you want to restrict it? ipv6 is not magic, just a complex new protocol for routing internet traffic that is not yet rolled out, and has no particular benefits for web transactions. It won't affect the web (that is, HTML served over HTTP) a damm.
As to your second question, because that would be a very stupid and bloody-minded idea. In order to make a simple web everyone can use it might just make sense to do it over a transport everyone can reliably and easily access, i.e. ipv4. Why the hell would you want to restrict it? ipv6 is not magic, just a complex new protocol for routing internet traffic that is not yet rolled out, and has no particular benefits for web transactions. It won't affect the web (that is, HTML served over HTTP) a damm.