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DRS uses a 'Content Model' approach to provide the best preservation support for a limited set of file types. Any type of file, however, can be deposited into DRS using a specific Content Model, called an Opaque Object. Files in an Opaque Object are given bit level preservation, but there are limited delivery options. The DRS Content Guide explains which file formats are appropriate for each supported Content Model.
ETDs from ProQuest can have a variety of file types in each submission package. For a given ETD submission package, each file with a currently supported DRS Content Model will be deposited in a separate DRS Object and assigned a 'Role'. All files in a submission package with formats that are not currently supported by a DRS Content Model will be put into one Opaque ObjectObjects. The example in the table below illustrates how file types from a submission would be assigned to a Content Model.
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More rules for OSNs and filenames are in the BatchBuilder User Guide
Gathering information to create ETD Objects
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*Text Content Model doesn't support the ARCHIVAL_MASTER role for files
ETD deposits into DRS - data validation
- Each batch should have the objects for only one ETD
- Each batch should have one and only one Thesis, i.e. a Document Object with ROLE=Thesis
- Each object in an ETD batch should have Harvard Metadata Link values for the ProQuest ID (type=local) and Alma ID (type=alma)
- If there is a DASH ID, it should be added to Harvard Metadata Links as a DASH type
- The Thesis document object should have MODS metadata from HOLLIS using the Alma MMSID
- The Thesis document object should have a defined relationship with all the other objects in the ETD batch
- Embargo information should be recorded in the Thesis and Supplements
- All the files listed in the fileSec of the mets.xml should match a file in the zip package
- Filenames should be sanitized before creating DRS batches
- Each file in the zip package, except the mets.xml, should have an entry in the fileSec of the mets.xml
- Each file in the zip package should be in one and only one object in the ETD batch
- The ProQuest ID for any object in a new ETD batch should not be in a previously deposited DRS object.