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Born-digital collections present a challenge to traditional ways of describing content and making it discoverable. Disks, drives, directories, etc. may contain many thousands of files which would be difficult to describe in detail in an EAD. The approach described here starts with an EAD that contains only a single reference to the born-digital portion of a collection, expressed as a specific Series within the larger collection. The Forensic Toolkit (FTK) software is used to produce both disk images and related analysis files, plus detailed technical information about individual files on the media. The output of this process is augmented, transformed and enhanced , and eventually transformed into a set of digital objects in DOR (Stanford's Fedora-based Digital Object Registry) as well as and shared objects for Hypatia. A separate process is used for converting the Collection EAD into metadata objects representing the full context of the born-digital and other materials, with links made between the containers and the detailed objects. |
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Information from: Disk Image // CMnnn.001.txt | maps to | notes |
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<collection_title>Stephen J. Gould Papers | Collection object | Equivalent to EAD <archdesc><title> |
<series>Series 6: Born Digital Materials | Series set object | Equivalent to EAD series <c><unittitle> |
<note>5.25 inch Floppy Disks</note> | Series object | Corresponds to EAD <physdesc> |
<callnumber>M1437</callnumber> | Collection object | Corresponds to EAD <archdesc><did><unitid> |
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Information from: FTK xml // Report_transformed.xml | maps to (all within item objects) | notes | ||
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<filename>BU3A5</filename> | n/a | this is the original file name as it appeared on the original media. | ||
<Item_Number>1004</Item_Number> | n/a | internal reference only, to disambiguate reference in the FTK report | ||
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="30cd2360a50a2b8c-dddf49d2-42b7411f-89029440-3e6a252e64501af5ac512580"><ac:plain-text-body><![CDATA[ | <filepath>CM006.001/NONAME [FAT12]/[root]/BU3A5</filepath> |
| original file in FTK xml // files | ]]></ac:plain-text-body></ac:structured-macro> |
<disk_image_no>CM006</disk_image_no> | descMetadata | This token, taken from the head of the <filepath>, is the only data link between the FTK output for a file object and the corresponding media object. We want a data link in descriptive metadata as well as an RDF link to the corresponding object. | ||
<filesize>35654</filesize> |
| Could be used by conversion to compare against the file size as computed locally, a quick check prior to checksum validation? | ||
<filesize_unit>B</filesize_unit> |
| Needed to correctly interpret <filesize>, if used | ||
<file_creation_date>n/a</file_creation_date> | note? |
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<file_accessed_date>n/a</file_accessed_date> | note? |
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<file_modified_date>12/8/1988 6:48:48 AM (1988-12-08 14:48:48 UTC)</file_modified_date> | note? |
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<MD5_Hash>976EDB782AE48FE0A84761BB608B1880</MD5_Hash> |
| Used for checksum validation of a file during processing. This value will eventually be part of contentMetadata, but probably not as a value transferred from here. | ||
<restricted>False</Restricted> |
| true=visible staff only, not discoverable .... Hypatia only | ||
<medium>5.25 inch Floppy Disks</medium> |
| Part of <location> (1) | ||
<type>Books</type> | descMetadata | <topic? or <genre>? authority? | ||
<title>The Burgess Shale and the Nature of History</title> | descMetadata |
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<filetype>WordPerfect 4.2</filetype> | note? |
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<Duplicate_File> </Duplicate_File> |
| * blank, null value or empty string - original file, not a duplicate | ||
<export_path>files\BU3A5.wp</export_path> |
| The file as available for the DOR object. Note it may have a file extension added by FTK. |
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