Bag ingest

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Feature description

Archivematica accepts transfers packaged in accordance with the Bagit specification.

Requirements

• All standard Bagit checks are run: verifyvalid, checkpayloadoxum, verifycomplete, verifypayloadmanifests, verifytagmanifests.
• Archivematica differentiates between mandatory and optional bag elements so that if optional elements are not present the bag does not fail the verification micro-service.
• The BagIt checks generate log files that will be added to the logs directory of the transfer.
• The BagIt file manifest (manifest-sha512.txt) is placed in the metadata directory of the transfer.
• The other BagIt files (bag-info.txt, bagit.txt, tagmanifest-md5.txt) will be placed in a logs/BagIt directory.
• No new PREMIS events are required. The BagIt checks are recorded as a fixity check in PREMIS.

Workflow

In this workflow diagram, the white ovals are manual steps and the grey ovals are automated steps.

Parse bag-info.txt contents to AIP METS file

• Enhancement being developed in 2015
• Labels in bag-info.txt file serialized as XML in METS sourceMD, linked to the objects directory of the AIP
  • Sample bag-info.txt (from https://tools.ietf.org/html/draft-kunze-bagit-10:

Source-Organization: Spengler University
Organization-Address: 1400 Elm St., Cupertino, California, 95014
Contact-Name: Edna Janssen
Contact-Phone: +1 408-555-1212
Contact-Email: ej@spengler.edu
External-Description: Uncompressed greyscale TIFF images from the
    Yoshimuri papers colle...
Bagging-Date: 2008-01-15
External-Identifier: spengler_yoshimuri_001
Bag-Size: 260 GB
Payload-Oxum: 279164409832.1198
Bag-Group-Identifier: spengler_yoshimuri
Bag-Count: 1 of 15
Internal-Sender-Identifier: /storage/images/yoshimuri
Internal-Sender-Description: Uncompressed greyscale TIFFs created
    from microfilm and are...

• • Sample AIP METS file excerpt:

<mets:amdSec ID="amdSec_14">
  <mets:sourceMD ID="sourceMD_1">
    <mets:mdWrap MDTYPE="OTHER" OTHERMDTYPE="BagIt">
      <mets:xmlData>
        <transfer_metadata>
          <Source-Organization>Spengler University</>
          <Organization-Address>1400 Elm St., Cupertino, California, 95014</>
          <Contact-Name>Edna Janssen</>
          <Contact-Phone>+1 408-555-1212</>
          <Contact-Email>ej@spengler.edu</>
          <External-Description> Uncompressed greyscale TIFF images from the Yoshimuri papers colle...</>
          <Bagging-Date>2008-01-15</>
          <External-Identifier>spengler_yoshimuri_001</>
          <Bag-Size>260 GB</>
          <Payload-Oxum>279164409832.1198</>
          <Bag-Group-Identifier>spengler_yoshimuri</>
          <Bag-Count>1 of 15</>
          <Internal-Sender-Identifier>/storage/images/yoshimuri</>
          <Internal-Sender-Description>Uncompressed greyscale TIFFs created from microfilm and are...</>
        </transfer_metadata>
      </mets:xmlData>
    </mets:mdWrap>
  </mets:sourceMD>
</mets:amdSec>