Just Watch This. Metaweb and How It's Going to Change Searching Online.

Google recently acquired Metaweb, a semantic web and real world database company that believes it can help improve search and make for a richer web experience. For more than four years, Metaweb has built an open database called Freebase which has a collection of structured data of over 12 million "entities." Each entity can be anything that's a person, place or thing and can be connected with other entities to derive meaning.

Have you noticed that when you do a search in Google a word can have multiple meanings. What Metaweb and Google hope to do is to better distinguish between all the definitions a word may have and deliver better search results.

A very interesting, but complex topic. I find the way they are set up very similar to linguistics. Perhaps, this could be the birth of a new topic, social linguistics?

The video explains this whole idea very well.