The PREMIS of the UCSD DAMS
description
Transcript of The PREMIS of the UCSD DAMS
Arwen Hutt & Bradley D. WestbrookMetadata Analysis and Specification Unit
UCSD Libraries
For PREMIS Workshop
La Jolla, CA, 11 Feb 2008
UCSD Libraries’ Digital Content◦ Digital production distributed throughout the libraries
(MSCL, SIO, AAL, etc.)◦ Projects dating from the mid-nineties ◦ Metadata (descriptive & technical) varies ◦ Formats are fairly, but not completely, homogenous;
primarily images at this point, but also text, audio and video.
UCSD Libraries’ DAMS◦ Bring together Libraries’ digital objects to facilitate
management◦ Normalize metadata
Problem of Technical Metadata◦ Common semantic units encoded/stored in many
different ways (both standard and local)◦ Simplify management ◦ Support format specific metadata
Choice of PREMIS◦ Express non format specific metadata◦ (Current) management procedures utilize the
same elements regardless of file format◦ Extensible for supporting future additional
management functions
METS Profiles ◦ Codify requirements for the DAMS◦ Simple Object Profile & Complex Object Profile◦ PREMIS techMD section required◦ Additional, techMD sections optional for format
specific metadata MIX Audio Spec / Guidelines (potential)
Elements◦ Required:◦ pre/object/objectIdentifier/objectIdentifierType◦ pre/object/objectIdentifier/objectIdentifierValue◦ pre/object/preservationLevel◦ pre/object/objectCategory (file)◦ pre/object/objectCharacteristics/fixity/messageDigestAlgorithm◦ pre/object/objectCharacteristics/fixity/messageDigest◦ pre/object/objectCharacteristics/size◦ pre/object/objectCharacteristics/format/formatName◦ pre/object/creatingApplication/dateCreatedByApplication◦ ◦ Encouraged, but not required:◦ pre/object/storage/storageMedium ◦ pre/object/objectCharacteristics/formatDesignation/formatVersion
pre/object/creatingApplication/creatingApplicationName◦ pre/object/originalName
Where does it come from?◦ Automated extraction and recording (jhove)◦ Taken from legacy metadata (either recorded in
house or vendor supplied)
Management Functions◦ Authenticity verification
Replication of files to CDL’s DPR◦ Format migration
Use only base level object assertions
No use of event, agent, or rights assertions