The OAIS reference model is a central piece of digital preservation. a new version (PDF), identified as CCSDS 650.0-M-2, has been released. It’s dated June 2012 but seems to have been publicly available for only a short time. Most people who know about OIAS know about SIPs, AIPs, and DIPs and not too much more, and I’m pretty much among the unlearned masses here, so I’ll just refer you to Barbara Sierman’s article, OAIS 2012 update, which has a summary of the important changes.
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