5.1.3.3 Repackaging

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A migration involves Repackaging when there is some change to the Packaging Information during the transfer. The Packaging Information plays the critical role of delimiting and relating, at a minimum, the Content Information and PDI. If the Content Information and PDI are themselves composed of multiple components, the Packaging Information may be asked to delimit and relate these as well. These are implementation decisions that the OAIS needs to explicitly recognize. The following scenario is an example of Repackaging:

All the Content Information and PDI bits for an AIP are contained within the body of three files on a CD-ROM. The Packaging Information consists of the bits used to implement the file and directory structure that provides access to these three files. The contents of the three files are moved to three new files on another media type, with a new directory and file implementation. Even if all the directory and file names have been preserved in the transfer, a Repackaging has taken place because the bits used to represent the Packaging Information have changed.


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