AIP structure

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Name

The AIP name is composed of the following:

1. Either the name of the original transfer if no new name has been assigned to the SIP upon formation or the name of the SIP or SIPs created from the transfer and
2. a UUID assigned during SIP formation

example: Images-aebbfc44-9f2e-4351-bcfb-bb80d4914112

"Images" is the name assigned by the user and "aebbfc44-9f2e-4351-bcfb-bb80d4914112" is the UUID generated during SIP formation.

Directory Structure

Figure 1 AIP directory - top level

BagIt documentation

• The AIP is packaged in accordance with the Library of Congress Bagit specification (PDF, 84KB) In Figure 1, the BagIt files are bag-info.txt, bagit.txt, manifest-sha512.txt and tagmanifest-md5.txt.

Data

Figure 2 AIP data directory

The data directory consists of the METS file and three folders: logs, metadata and objects.(See Figure 2)

• Logs: contains normalization log, malware scan log, and submission documentation extraction log generated during SIP creation. (See Figure 3 below)
• Metadata: contains a folder containing logs from each transfer that makes up the SIP. The METS file for each transfer's original order is contained within the log file for the transfer (see bottom of page at METS for Archivematica transfer).(See Figure 4 below) More information about the contents of the "transfer" file(s) and screenshots in Transfer section below.
• Objects: contains original objects, normalized objects and submission documentation. If there were any lower level directories within the SIP, that directory structure is maintained. (See Figure 5 below)

• METS file containing the full PREMIS implementation (see PREMIS metadata for original file, PREMIS metadata: normalized files, PREMIS metadata: events, and PREMIS metadata: rights

Figure 3 Logs folder content in Data

Figure 4 Metadata folder content in Data

Figure 5 Objects folder content in Data

The Transfers folder

In the AIP, the transfers folder contains information about each transfer included in the formation of the SIP. At the top level of the transfer folder, you will see each transfer. Figure 6 shows the contents of the transfers folder from an AIP derived from a SIP made up of only one transfer.

Figure 6 Transfer(s) within the transfer folder. Note: This is a SIP made from one transfer, but it could contain many transfers that make up a SIP.

Once you open up a single transfer, you will see logs and metadata folders for that transfer. (See Figure 7)

Figure 7 Contents of a single transfer. Note: there could be one or many transfers that make up a SIP

The logs folder contains the malware scan log, metadata extraction log, filename cleanup log, file UUID log, and the METS file that reflects the original order of the transfer before it underwent any arrangement and appraisal actions contributing to the formations of the SIP. (See Figure 8)

Figure 8 Contents of the logs folder within a single transfer

The metadata folder contains a folder with any submission documentation submitted with the transfer. These files could be donor agreements, transfer forms, copyright agreements and any correspondence or other documentation relating to the transfer. Note that at the top level, within the data logs folder, there are copies of this documentation. If this were an AIP made up of SIPs composed of multiple transfers, the data logs folder would contain copies of the submission documentation from each of those transfers. Copies of the submission documentation contained in the AIP at the data logs level has been normalized for preservation.

Figure 9 Submission Documentation folder for a single transfer