Memento: Protocol-Based Time Travel for the Web
Gerry Bayne,
EDUCAUSE,
Jan 25, 2010
This is a really good idea - if you bookmark a page, and it changes, you retrieve an earlier version. "The Memento solution has been designed to achieve this solution. It is based on existing HTTP capabilities applied in a novel way to add the temporal dimension. The result is a framework in which archived resources can seamlessly be reached via the uniform resource identifier." The page links to a ten-minute MP3 podcast.
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