Versions Compared

Old Version 2

changes.mady.by.user Unknown User (escowles@ucsd.edu)

Saved on

compared with

New Version 3

changes.mady.by.user Unknown User (escowles@ucsd.edu)

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Types of events in the lifecycle of repository objects, drawn from the PREMIS Event Type vocabulary and augmented with some other event types identified by UCSD.  Some of these events correspond to actions performed by the Fedora 4 REST API, while others correspond to actions performed with other systems outside of the repository.

Event TypeVocabularyDescription
capturePREMISThe process whereby a repository actively obtains an object.
compressionPREMISThe process of coding data to save storage space or transmission time.
creationPREMISThe act of creating a new object.
deaccessionPREMISThe process of removing an object from the inventory of a repository.
decompressionPREMISThe process of reversing the effects of compression.
decryptionPREMISThe process of converting encrypted data to plain text.
deletionPREMISThe process of removing an object from repository storage.
digital signature validationPREMISThe process of determining that a decrypted digital signature matches an expected value.
fixity checkPREMISThe process of verifying that an object has not been changed in a given period.
ingestionPREMISThe process of adding objects to a preservation repository.
message digest calculationPREMISThe process by which a message digest ("hash") is created
  • In Fedora 4, this is done automatically when a non-RDF resource is created, which probably doesn't merit a separate event. However, message digest calculation can also be done externally before uploading content (to use the message digest to verify uncorrupted transfer), which would be a separate event.
migrationPREMISA transformation of an object creating a version in a more contemporary format.
normalizationPREMISA transformation of an object creating a version more conducive to preservation.
replicationPREMISThe process of creating a copy of an object that is, bit-wise, identical to the original.
validationPREMISThe process of comparing an object with a standard and noting compliance or exceptions.
virus checkPREMISThe process of scanning a file for malicious programs.
metadata modificationUCSD Modifying an RDF source by posting RDF, using SPARQL Update, etc. 
content modificationUCSDModifying a non-RDF source by uploading updated content.
derivative creationUCSD Generating derivative versions of content files.
indexingUCSD Generating a derivative of an object, such as a Solr index record, updating an external triplestore, etc. possibly using the fcrepo-camel or fcrepo-message-consumer components.

...