A bag is like a folder or directory on a computer. It is essentially comprised of three elements: A bag declaration text file, which is like a seal of authenticity; a text-file manifest listing the files in the collection; and a subdirectory – usually titled “data” – filled with the digital content. The manifest is machine readable for automated data ingest. The receiving computer analyzes the manifest and runs checksums on the contents; if the checksums match, the transfer is successful.
Monday, July 6, 2009
The Library of Congress’s NDIIPP website, digitalpreservation.gov, provides access to information about preserving digital culture. Recently added to the site is information about the BagIt digital transfer tool: