Facebook Open Graph: A new take on semantic web: "By re-imagining the web as the graph of things we are interested in, a new dimension, a new set of connections gets unlocked -- everything and everyone connects in a whole new way."
An iteration of Ian's work, called RDFa, has been adopted as a W3C standard. All the signs point in the direction of RDFa being the solution of choice for describing entities inside HTML pages.
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