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