In ten minutes Tim Berners-Lee explains his five star scheme for data using a packet of crisps: one star is awarded for simply putting up any kind of data and making it available to people, whilst five stars are reserved for linked open data.
This is also a very nice illustration of what the different levels of data look like in practice, as well as the costs and benefits attached to each, using an example of the temperature forecast for Galway for the next 3 days, by Dr Michael Hausenblas at DERI, NUIG.
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