foaf
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The Friend of a Friend (FOAF) project is creating a Web of machine-readable pages describing people, the links between them and the things they create and do; it is a contribution to the linked information system known as the Web . FOAF defines an open, decentralized technology for connecting social Web sites, and the people they describe. [ more... ] FOAF is part of a shift towards a Web where we can choose the sites and tools we like, without being cut off from friends who made different choices. FOAF lets you share and inter-connect information from diverse sources, move it around, and use it in unexpected new ways. [ more... ]
The Friend of a Friend (FOAF) project | FOAF project
FOAF-a-matic -- Describe yourself in RDF
In short though, FOAF is a way to describe yourself -- your name, email address, and the people you're friends with -- using XML and RDF. This allows software to process these descriptions, perhaps as part of an automated search engine, to discover information about your and the communities of which you're a member. FOAF has the potential to drive many new interesting developments in online communities. Ben Hammersely's " Click to the Clique " article for the Guardian Unlimited website further explores these ideas. The FOAF-a-Matic is being provided as a quick and easy way for you to create your own FOAF description. Simply work through the forms on this page and complete whichever details you'd like to add to your description.
From W3C Wiki These FOAF Sites are open social networking sites which host a large amount of 'Friend of a Friend' FOAF data. Typically, they generate it automatically for all users. If you know of sites not on the list, please add them.