Is project to drive standards for creating a Web of machine-readable pages describing people, the links between them and the things they create and do;
a common API for social applications across multiple websites. With standard JavaScript and HTML, developers can create apps that access a social network's friends and update feeds.
Freebase is an open, Creative Commons licensed repository of structured data of almost 22 million entities. An entity is a single person, place, or thing. Freebase connects entities together as a graph.