Metaweb, a formerly San Francisco startup, now Google’s company (2010) helps smartest search engine to find and distinguish different words that may have different values like Paris may be Paris France or Paris Hilton. The complicated mechanics of metaweb uses semantic relationships between people and things from around the web, including websites, ebooks, information about movies, and businesses – all combined in open Freebase database maintained by Google. In other words, Metaweb maintains Freebase.
via Freebase.com – Metaweb (the company) has developed Metaweb (the database and API). Freebase (the open global structured knowledge base) is a high-profile public instantiation of the Metaweb technology. This manual documents general Metaweb services and APIs, and relies on Freebase for example data and applications. The services and APIs are applicable beyond Freebase, however, and you’ll find that this manual uses the name “Metaweb” far more than it does the name “Freebase”.