These detailed descriptions of the OAIS Functions are taken directly from the Reference Model for an Open Archival Information System (OAIS).
The home of the OAIS Reference model is NASA's Consultative Committee on Space Data Systems's site: http://www.ccsds.org/documents/650x0b1.pdf
The CCSDS has changed the location of the document several times over the past
few years. We keep a local copy at:
http://www.library.cornell.edu/dlit/MathArc/web/resources/OAISReferenceModel--Jan2002--CCSDS650.0-B-1.pdf